                         Nebraska Advance Sheets
	                              STATE v. PANGBORN	363
	                               Cite as 286 Neb. 363

                         CONCLUSION
   Because no error was assigned to TERC’s determination
that Krings’ land was nonagricultural and nonhorticultural, we
affirm that portion of TERC’s order in which it so concluded.
There is also no challenge to the correctness of the determina-
tion that a small portion of the property was agricultural and
horticultural and that it was subject to equalization with other
agricultural and horticultural land in the county, and we enter
no order affecting this decision. We conclude that TERC erred
when it equalized the value of Krings’ nonagricultural, nonhor-
ticultural land with the value of agricultural and horticultural
land in the county. TERC’s decision to equalize in this fashion
did not conform to the law. We therefore reverse those portions
of the order in which TERC reversed the Board’s valuation
regarding Krings’ nonagricultural, nonhorticultural property
and performed such equalization. We remand the cause to
TERC with directions to enter an order ruling on the Board’s
determinations, consistent with this opinion.
	Affirmed in part, and in part reversed
	                      and remanded with directions.
   Connolly and Miller-Lerman, JJ., participating on briefs.



                    State of Nebraska, appellee, v.
                   Matthew L. Pangborn, appellant.
                                   ___ N.W.2d ___

                         Filed July 26, 2013.   No. S-12-941.

 1.	 Trial: Evidence: Appeal and Error. The admission of demonstrative evidence
     is within the discretion of the trial court, and a judgment will not be reversed on
     account of the admission or rejection of such evidence unless there has been a
     clear abuse of discretion.
 2.	 Trial: Juries: Evidence. Demonstrative exhibits are defined by the purpose for
     which they are offered at trial—to aid or assist the jury in understanding the evi-
     dence or issues in a case.
 3.	 Trial: Evidence. Exhibits admitted only for demonstrative purposes do not con-
     stitute substantive evidence.
 4.	 Rules of Evidence. Where a Nebraska Evidence Rule is substantially similar to
     a corresponding federal rule of evidence, Nebraska courts will look to federal
    Nebraska Advance Sheets
364	286 NEBRASKA REPORTS


        decisions interpreting the corresponding federal rule for guidance in construing
        the Nebraska rule.
 5.	    Trial: Judges. In Nebraska, a trial judge has broad discretion over the conduct of
        a trial.
 6.	    Rules of Evidence: Appeal and Error. When the Nebraska Evidence Rules
        commit the evidentiary question at issue to the discretion of the trial court, an
        appellate court reviews the admissibility of evidence for an abuse of discretion.
 7.	    Trial: Judges: Juries: Evidence. A trial judge may exercise his or her broad
        judicial discretion to allow or disallow the use of demonstrative exhibits during
        jury deliberations.
  8.	   ____: ____: ____: ____. It is an abuse of discretion for a trial judge to send a
        demonstrative exhibit to the jury for use in deliberations without first weighing
        the potential prejudice in allowing such use against the usefulness of the exhibit
        and employing adequate safeguards to prevent prejudice.
 9.	    Criminal Law: Appeal and Error. Errors, other than structural errors, which
        occur within the trial and sentencing process, are subject to harmless error review.
10.	    Criminal Law: Trial: Juries: Appeal and Error. In a jury trial of a criminal
        case, harmless error exists when there is some incorrect conduct by the trial court
        which, on review of the entire record, did not materially influence the jury in
        reaching a verdict adverse to a substantial right of the defendant.
11.	    Criminal Law: Juries: Evidence: Appeal and Error. In a jury trial of a crimi-
        nal case, an erroneous evidentiary ruling results in prejudice to a defendant unless
        the State demonstrates that the error was harmless beyond a reasonable doubt.
12.	    Verdicts: Juries: Appeal and Error. Harmless error review looks to the basis
        on which the trier of fact actually rested its verdict; the inquiry is not whether
        in a trial that occurred without the error a guilty verdict would surely have been
        rendered, but, rather, whether the actual guilty verdict rendered in the questioned
        trial was surely unattributable to the error.
13.	    Constitutional Law: Criminal Law: Double Jeopardy: Evidence: New Trial:
        Appeal and Error. The Double Jeopardy Clauses of the federal and state
        Constitutions do not forbid a retrial after an appellate determination of prejudicial
        error in a criminal trial so long as the sum of all the evidence admitted by the
        trial court, whether erroneously or not, would have been sufficient to sustain a
        guilty verdict.
14.	    Appeal and Error. An appellate court is not obligated to engage in an analysis
        that is not necessary to adjudicate the case and controversy before it.
15.	    ____. An appellate court may, at its discretion, discuss issues unnecessary to
        the disposition of an appeal where those issues are likely to recur during fur-
        ther proceedings.

  Appeal from the District Court for Gage County: Paul W.
Korslund, Judge. Reversed and remanded for a new trial.
       Brett McArthur for appellant.
  Jon Bruning, Attorney General, and George R. Love for
appellee.
                        Nebraska Advance Sheets
	                            STATE v. PANGBORN	365
	                             Cite as 286 Neb. 363

  Heavican,         C.J.,   Wright,     Stephan,     McCormack,        and
Cassel, JJ.
      Cassel, J.
                       I. INTRODUCTION
   Matthew L. Pangborn appeals from his convictions and sen-
tences on nine counts involving actual or attempted violence or
physical abuse upon “persons with intellectual disabilities who
require[d] residential care.”1 The main question presented is
whether the district court abused its discretion in allowing the
jury to use in its deliberations the State’s “road map”—a chart
admitted for demonstrative purposes only. Because the district
court allowed the use of this demonstrative exhibit in jury
deliberations without providing adequate limiting instructions
or employing any other safeguards against prejudice, we find
that the court abused its discretion. We reverse, and remand for
a new trial.
                       II. BACKGROUND
   In October 2011, a complaint was filed in county court
charging Pangborn with six counts of abuse of a vulnerable
adult and five counts of strangulation. All counts arose from
Pangborn’s employment at the Beatrice State Developmental
Center (BSDC) in Beatrice, Nebraska, and involved three adult
residents at that facility. The parties stipulated that all three
alleged victims were vulnerable adults as defined by statute.
After a hearing in county court, Pangborn was bound over
to the district court for arraignment. He entered pleas of “not
guilty” to all 11 counts. One count of strangulation was later
dismissed with prejudice at the State’s request.
   A jury trial on the remaining 10 counts was held over
several days in July 2012. During the trial, eight witnesses
testified and numerous exhibits were admitted into evidence.
In particular, exhibit 36 was central to presentation of the
State’s case. Having prepared the exhibit as a “road map”
of its case, the State repeatedly relied upon exhibit 36 when
delivering opening and closing statements and when examining

 1	
      See 2013 Neb. Laws, L.B. 23, § 50 (prior version codified at Neb. Rev.
      Stat. § 83-217 (Reissue 2008)).
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and cross-examining witnesses. Exhibit 36 was admitted for
demonstrative purposes only, but later was submitted to the
jury for use during deliberations, over Pangborn’s objection.
Two other exhibits are relevant for purposes of appeal. Exhibits
37 and 38 consisted of timesheets from BSDC and were admit-
ted under the business records exception to the hearsay rule,
which admission Pangborn assigns as error.
   Before we more thoroughly describe the circumstances sur-
rounding the use of exhibit 36—circumstances which are
critical to our analysis—we provide a detailed description of
the exhibit. Exhibit 36 was a one-page chart that the State
described as providing a “road map” that it would use “dur-
ing the course of the trial for clarification purposes only.”
It consisted of five columns labeled “COUNT,” “VICTIM,”
“WITNESS,” “LOCATION,” and “INJURY.” Each of the 11
original charges was listed in the column labeled “COUNT.”
For each count, the remaining columns identified the BSDC
resident who was the alleged victim, the individual who sup-
posedly witnessed Pangborn’s abuse upon the victim (all of
whom testified at trial to what they saw), the exact loca-
tion where the alleged abuse was witnessed, and the precise
nature of the violence allegedly inflicted upon the victim by
Pangborn. These injuries were identified in the fifth column
of the chart as “[s]truck on top of head,” “[s]truck on ear,”
“[e]lbowed in chest,” “[c]hoked unconscious,” or “[c]hoked.”
Essentially, the exhibit was a concise summary of the evidence
the State planned to present against Pangborn on each count—
hence, a “road map.”
   The morning of trial, the parties discussed the proposed
exhibit 36 with the district court in the absence of the jury.
Pangborn had no objection to the use of exhibit 36 for demon-
strative purposes, but moved that the jury not be allowed to use
the exhibit during deliberations. At that time, the court received
exhibit 36 for demonstrative purposes, but held that the exhibit
could not be used during deliberations. The court did not com-
municate this ruling to the jury in any way but merely asked
the State to “offer” exhibit 36 before publishing it to the jury
at trial and noted that the court might revisit the issue of use
during deliberations at a later time.
                   Nebraska Advance Sheets
	                       STATE v. PANGBORN	367
	                        Cite as 286 Neb. 363

   Throughout the trial that followed, the State relied heavily
upon its “road map” in presenting its case against Pangborn.
Despite this extensive usage of the exhibit, the district court
did not explain to the jury the limited purpose of the exhibit,
distinguish it from other substantive exhibits, or provide any
guidance regarding its proper use.
   Early in its opening statement, the State first displayed
exhibit 36 to the jury. But the State did not offer the exhibit
as the district court had requested or ask for permission to
publish. The only explanation provided for the exhibit was the
following statement made by the State during opening argu-
ments: “In order to help you try to work through this, we have
prepared what we are calling a road map, and we encourage
you to utilize this. It’s been stipulated to by the parties and
provided also to the judge . . . .” The court neither clarified nor
elaborated upon the State’s minimal explanation.
   Although the record is not precisely clear about each instance
when exhibit 36 was used during the remainder of the trial,
the briefs suggest that exhibit 36 was employed by the State
throughout the examination and cross-examination of witnesses
and was frequently displayed to the jury. Neither the State nor
the district court identified exhibit 36 as having previously
been admitted for demonstrative purposes at any point during
the trial.
   At the conclusion of all evidence, the district court held an
in-chambers jury instruction conference. During that confer-
ence, the court announced that it was going “to take up on
[its] own motion the matter of Exhibit 36.” Because it found
that exhibit 36 “would be very helpful to the jury to have
and would not be prejudicial, although, it is a demonstrative
exhibit,” the court ruled that the jury would be allowed to
use exhibit 36 during deliberations. Pangborn objected, but
his objection was overruled. Neither this ruling nor any other
explanation regarding the use of exhibit 36 during deliberations
was communicated to the jury.
   Following closing arguments, the district court gave jury
instructions and submitted the case to the jury. The court’s
instructions to the jury included the standard jury instruction
on exhibits admitted for limited purposes: “During the trial[,]
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368	286 NEBRASKA REPORTS



I called your attention to some evidence that was received for
a specific limited purpose; you must consider that evidence
only for those limited purposes and for no other.” Significantly,
however, the instructions given by the court failed to identify
that exhibit 36 had been admitted for the limited purpose of a
demonstrative exhibit. And, as noted earlier, the court initially
admitted exhibit 36 outside the presence of the jury and never
informed the jury at any point during the trial that the exhibit
was admitted only for demonstrative purposes.
   After deliberation, the jury found Pangborn guilty on four
counts of abuse of a vulnerable adult, one count of attempted
abuse of a vulnerable adult, three counts of strangulation,
and one count of attempted strangulation. The jury found
Pangborn not guilty of one count of abuse of a vulnerable
adult. After unsuccessfully moving for a new trial, Pangborn
was sentenced to an aggregate sentence of 15 to 23 years’
imprisonment.
   Pangborn timely appeals. Pursuant to statutory authority, we
moved the case to our docket.2

                III. ASSIGNMENTS OF ERROR
   Pangborn chiefly assigns that the district court abused its
discretion in permitting the jury to take exhibit 36 into the
jury room for use during deliberations. Pangborn also assigns,
reordered and restated, that the court erred in admitting exhib-
its 37 and 38, that there was insufficient evidence to support
the verdicts, and that he received excessive sentences. Because
we find reversible error, we reach only the assignment of error
regarding the demonstrative exhibit.

                IV. STANDARD OF REVIEW
   [1] The admission of demonstrative evidence is within the
discretion of the trial court, and a judgment will not be
reversed on account of the admission or rejection of such evi-
dence unless there has been a clear abuse of discretion.3

 2	
      See Neb. Rev. Stat. § 24-1106(3) (Reissue 2008).
 3	
      American Central City v. Joint Antelope Valley Auth., 281 Neb. 742, 807
      N.W.2d 170 (2011).
                        Nebraska Advance Sheets
	                             STATE v. PANGBORN	369
	                              Cite as 286 Neb. 363

                           V. ANALYSIS
                 1. Use of Demonstrative Exhibit
                      During Deliberations
                        (a) Issue on Appeal
   Pangborn argues that the district court abused its discretion
in allowing the jury to take a demonstrative exhibit into the
jury room for use during deliberations. The relevant demon-
strative exhibit—exhibit 36—was the State’s “road map” of
its case against Pangborn. Initially, the court admitted exhibit
36 for demonstrative purposes only. This occurred prior to
the start of trial and out of the presence of the jury. At that
time, Pangborn agreed to the admission of exhibit 36 for
demonstrative purposes only. However, at the conclusion of
evidence and over Pangborn’s objection, the court ruled upon
its own motion that the jury would be allowed to take exhibit
36 into the jury room for deliberations. At no point during
the trial itself or during final jury instructions did the court
inform the jury that exhibit 36 was admitted for demonstra-
tive purposes or provide a limiting instruction specific to
exhibit 36. We must decide whether this was an abuse of the
court’s discretion.
   Pangborn does not challenge the actual admission of exhibit
36 into evidence for demonstrative purposes or its use dur-
ing trial. He assigns error only to its use during deliberations.
However, before reaching the question whether demonstrative
exhibits can be used during jury deliberations, we must first
clarify what is meant by the “admission” of a demonstra-
tive exhibit.

                 (b) Admission of Demonstrative
                            Exhibits
   We historically have discussed the use of demonstrative
exhibits in terms of admissibility. In Benzel v. Keller Indus.,4
we adopted “principles for determining the admissibility of
demonstrative exhibits in civil cases” and held that “demon-
strative exhibits are admissible if they supplement the witness’

 4	
      Benzel v. Keller Indus., 253 Neb. 20, 28, 567 N.W.2d 552, 558 (1997).
    Nebraska Advance Sheets
370	286 NEBRASKA REPORTS



spoken description of the transpired event, clarify some issue in
the case, and are more probative than prejudicial.” Conversely,
we stated that “[d]emonstrative exhibits are inadmissible when
they do not illustrate or make clearer some issue in the case;
that is, where they are irrelevant, or where the exhibit’s charac-
ter is such that its probative value is substantially outweighed
by the danger of unfair prejudice.”5 Based upon these prin-
ciples, we have discussed in other cases whether demonstrative
exhibits are “admissible”6 and whether their “admission” is an
abuse of discretion.7
   [2] But the use of such terminology can be misleading.
Demonstrative exhibits are broadly defined as aids “offered
to illustrate or explain the testimony of witnesses, including
experts, or to present a summary or chronology of complex
or voluminous documents.”8 Our case law specifically defines
demonstrative exhibits as those that “clarify some issue in the
case.”9 As these definitions highlight, demonstrative exhib-
its are defined by the purpose for which they are offered at
trial—to aid or assist the jury in understanding the evidence
or issues in a case.10 “They are relevant . . . only because of
the assistance they give to the trier in understanding other real,
testimonial and documentary evidence.”11 Thus, even though
demonstrative exhibits may be “admitted” into evidence during
the course of the trial, they serve a purpose distinct from other
exhibits admitted for substantive and not merely demonstrative


 5	
      Id.
 6	
      State v. Daly, 278 Neb. 903, 925, 775 N.W.2d 47, 66 (2009). Accord State
      v. Gutierrez, 272 Neb. 995, 726 N.W.2d 542 (2007), abrogated on other
      grounds, State v. Thorpe, 280 Neb. 11, 783 N.W.2d 749 (2010).
 7	
      American Central City v. Joint Antelope Valley Auth., supra note 3, 281
      Neb. at 756, 807 N.W.2d at 182. Accord, State v. Daly, supra note 6; State
      v. Gutierrez, supra note 6.
 8	
      2 McCormick on Evidence § 214 at 18 (Kenneth S. Broun et al. eds., 7th
      ed. 2013).
 9	
      Benzel v. Keller Indus., supra note 4, 253 Neb. at 28, 567 N.W.2d at 558.
10	
      See 2 McCormick on Evidence, supra note 8.
11	
      Id., § 214 at 19.
                          Nebraska Advance Sheets
	                               STATE v. PANGBORN	371
	                                Cite as 286 Neb. 363

purposes. For this reason, some courts refer to demonstrative
exhibits as “pedagogical aid[s]”12 or “pedagogical devices”13 so
as to highlight this difference in purpose.
   [3] Due to the difference in purpose, an exhibit admit-
ted for a demonstrative purpose—that is, to aid the jury—is
not evidence in the same way that an exhibit admitted for a
substantive purpose—that is, as proof of an underlying fact
or occurrence—is evidence. Our case law does not state that
demonstrative exhibits are not to be considered as substan-
tive evidence. However, a majority of circuit courts have so
held,14 and the major evidence treatises agree.15 We likewise
agree with this proposition and now hold that exhibits admit-
ted only for demonstrative purposes do not constitute substan-
tive evidence.

                  (c) Demonstrative Exhibits
                     in Jury Deliberations
  Just because demonstrative exhibits are not substantive
evidence does not mean that they should be excluded auto-
matically from jury deliberations. As mentioned earlier, the
explicit purpose of a demonstrative exhibit is to aid the jury

12	
      See, e.g., U.S. v. Milkiewicz, 470 F.3d 390, 398 (1st Cir. 2006). See, also,
      U.S. v. Buck, 324 F.3d 786 (5th Cir. 2003).
13	
      See, e.g., U.S. v. Bray, 139 F.3d 1104, 1111 (6th Cir. 1998). See, also, U.S.
      v. Harms, 442 F.3d 367 (5th Cir. 2006); U.S. v. Janati, 374 F.3d 263 (4th
      Cir. 2004).
14	
      See, e.g., U.S. v. Milkiewicz, supra note 12; U.S. v. Harms, supra note
      13; U.S. v. Janati, supra note 13; U.S. v. Bray, supra note 13; U.S. v.
      Wood, 943 F.2d 1048 (9th Cir. 1991); U.S. v. Casamento, 887 F.2d 1141
      (2d Cir. 1989); Conford v. United States, 336 F.2d 285 (10th Cir. 1964);
      Ratner v. Arrington, 111 So. 2d 82 (Fla. App. 1959); Smith v. Ohio Oil
      Co., 10 Ill. App. 2d 67, 134 N.E.2d 526 (1956); In re Estate of Lucitte,
      No. L-10-1136, 2012 WL 362002 (Ohio App. Feb. 3, 2012) (unpublished
      opinion); Christensen v. Cober, 206 Or. App. 719, 138 P.3d 918 (2006);
      Markey v. State, 996 S.W.2d 226 (Tex. App. 1999); State v. Lord, 117
      Wash. 2d 829, 822 P.2d 177 (1991) (en banc).
15	
      See, 2 McCormick on Evidence, supra note 8; 4 Jack B. Weinstein &
      Margaret A. Berger, Weinstein’s Federal Evidence § 611.02[2][a][vii]
      (Joseph M. McLaughlin ed., 2d ed. 2011).
    Nebraska Advance Sheets
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in its consideration of the evidence and issues in a case.16
Undoubtedly, in a complex case, demonstrative exhibits would
be most helpful when the jury considers the totality of the evi-
dence during deliberations. As the Seventh Circuit has stated,
demonstrative exhibits “often are useful tools that enable the
jury to visualize and organize the large volume of data pro-
duced by trial testimony.”17
   Precisely because demonstrative exhibits can be exceedingly
useful, many courts allow demonstrative exhibits to be used in
jury deliberations under certain circumstances.18 Although the
Nebraska Court of Appeals has tangentially discussed matters
pertinent to the use of demonstrative exhibits in jury delibera-
tions, it did not reach the exact issue presented by the present
appeal.19 Thus, because this is an issue of first impression
in Nebraska, we review the pertinent case law from other
jurisdictions.



16	
      See 2 McCormick on Evidence, supra note 8.
17	
      United States v. Radtke, 799 F.2d 298, 311 (7th Cir. 1986) (Flaum, Circuit
      Judge, concurring in part, and in part dissenting).
18	
      See, e.g., U.S. v. Milkiewicz, supra note 12; U.S. v. Harms, supra note 13;
      U.S. v. Salerno, 108 F.3d 730 (7th Cir. 1997); U.S. v. Johnson, 54 F.3d
      1150 (4th Cir. 1995); U.S. v. Casamento, supra note 14; United States v.
      Scales, 594 F.2d 558 (6th Cir. 1979); United States v. Downen, 496 F.2d
      314 (10th Cir. 1974); United States v. Warner, 428 F.2d 730 (8th Cir.
      1970); Shane v. Warner Mfg. Corp., 229 F.2d 207 (3d Cir. 1956); Rossell
      v. Volkswagen of America, 147 Ariz. 160, 709 P.2d 517 (1985); Williams
      v. First Security Bank of Searcy, 293 Ark. 388, 738 S.W.2d 99 (1987);
      Higgins v. L. A. Gas & Electric Co., 159 Cal. 651, 115 P. 313 (1911);
      People v. Manley, 133 Ill. App. 2d 882, 272 N.E.2d 411 (1971); Pearson
      v. State, 441 N.E.2d 468 (Ind. 1982); State v. Yowell, 513 S.W.2d 397
      (Mo. 1974), (superseded by statute on other grounds as stated in State
      v. Milliorn, 794 S.W.2d 181 (Mo. 1990)); In re Estate of Lucitte, supra
      note 14; Lord v. State, Nos. A-1586, 1HA-S84-84CR, 1989 WL 1595110
      (Alaska App. Sept. 6, 1989) (unpublished memorandum opinion); State
      v. Evans, No. 376614-4-I, 1998 WL 184909 (Wash. App. Apr. 20, 1998)
      (unpublished disposition listed at 90 Wash. App. 1028 (1998)).
19	
      See McFadden v. Winters & Merchant, Inc., 8 Neb. App. 870, 603 N.W.2d
      31 (1999).
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	                               STATE v. PANGBORN	373
	                                Cite as 286 Neb. 363

              (i) Approaches of Other Jurisdictions
                       a. Federal Case Law
   Allowing or disallowing the use of demonstrative exhibits
in deliberations usually is a matter of discretion.20 Rule 611(a)
of the Federal Rules of Evidence—the federal rule governing
the mode of presenting evidence in court—is regularly cited as
giving courts general discretion over the use of demonstrative
exhibits during trial.21
   Prior to its restyling in 2011, Fed. R. Evid. 611(a) was
identical to Neb. Evid. R. 611(1), Neb. Rev. Stat. § 27-611(1)
(Reissue 2008). The 2011 amendments to the Federal Rules of
Evidence were meant to be stylistic only.22 Therefore, federal
rule 611(a) remains substantively identical to § 27-611(1).
   [4] Where a Nebraska Evidence Rule is substantially similar
to a corresponding federal rule of evidence, Nebraska courts
will look to federal decisions interpreting the corresponding
federal rule for guidance in construing the Nebraska rule.23 We
thus begin by looking to the federal courts for guidance on the
use of demonstrative exhibits during jury deliberations.
   Of the 13 circuits, 10 permit demonstrative exhibits to be
used by the jury during deliberations when certain circum-
stances are present. As will be explained below, these cir-
cumstances vary from the use of limiting instructions or other
safeguards to consent of the parties.


20	
      See, e.g., U.S. v. Milkiewicz, supra note 12; U.S. v. Salerno, supra note
      18; United States v. Downen, supra note 18; Shane v. Warner Mfg. Corp.,
      supra note 18; U.S. v. Hollie, No. 98-1103, 1999 WL 1021860 (6th Cir.
      Nov. 3, 1999) (unpublished disposition listed in table of “Decisions
      Without Published Opinions” at 198 F.3d 248 (6th Cir. 1999)).
21	
      See, e.g., U.S. v. Irvin, 682 F.3d 1254 (10th Cir. 2012); U.S. v. Milkiewicz,
      supra note 12; U.S. v. Taylor, 210 F.3d 311 (5th Cir. 2000); U.S. v.
      Salerno, supra note 18; U.S. v. Johnson, supra note 18; U.S. v. Pinto, 850
      F.2d 927 (2d Cir. 1988); U.S. v. Possick, 849 F.2d 332 (8th Cir. 1988);
      United States v. Gardner, 611 F.2d 770 (9th Cir. 1980); United States v.
      Scales, supra note 18.
22	
      See Fed. R. Evid. 611(a), advisory committee note on 2011 amendment.
23	
      Breeden v. Anesthesia West, 265 Neb. 356, 656 N.W.2d 913 (2003).
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   The most common prerequisite for the use of demonstra-
tive exhibits during jury deliberations is the use of safeguards
against prejudice. In the 2d,24 3d,25 and 10th26 Circuits, the
only requirement for sending demonstrative exhibits to the jury
room is the giving of a limiting instruction. The First Circuit
also requires that trial courts employ adequate safeguards
against prejudice, such as jury instructions, editing to remove
prejudicial content, and opportunity for the exhibit’s opponent
“to expose his concerns to the jury.”27 In addition, trial courts
in the First Circuit must determine that demonstrative exhibits
would be useful to the jury.28
   The remaining circuits that allow demonstrative exhibits to
be used in jury deliberations each employ different approaches.
The Fourth Circuit allows demonstrative exhibits to go to the
jury during deliberations following the “proper admission of
the summary chart into evidence.”29 The Fifth Circuit requires
only consent of the parties.30 The 11th Circuit has the most
restrictive rule regarding the use of demonstrative exhibits
in jury deliberations. It has held that it is an abuse of dis-
cretion to send demonstrative exhibits to the jury for use in
deliberations in all circumstances except three: (1) where the
exhibit is not hearsay, (2) where extensive cross-examination is
allowed, or (3) where chain of custody is a contested issue.31 In
contrast to the 11th Circuit’s precise rule, the 6th,32 7th,33 and


24	
      See U.S. v. Casamento, supra note 14.
25	
      See Shane v. Warner Mfg. Corp., supra note 18.
26	
      See, e.g., United States v. Downen, supra note 18.
27	
      U.S. v. Milkiewicz, supra note 12, 470 F.3d at 400.
28	
      See id.
29	
      U.S. v. Johnson, supra note 18, 54 F.3d at 1161 n.11.
30	
      See, e.g., U.S. v. Harms, supra note 13; U.S. v. Taylor, supra note 21.
31	
      See U.S. v. Pendas-Martinez, 845 F.2d 938 (11th Cir. 1988).
32	
      See, e.g., United States v. Scales, supra note 18; U.S. v. Hollie, supra
      note 20.
33	
      See, e.g., U.S. v. Salerno, supra note 18; United States v. Bernard, 287
      F.2d 715 (7th Cir. 1961).
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8th34 Circuits sometimes allow pedagogical exhibits to go to
the jury during deliberations, but have no consistent rule. At
one time or another, both the Seventh35 and Eighth36 Circuits
have required limiting instructions.
   In summary, although there is no uniform approach among
the circuit courts, the use of limiting instructions is the
most prevalent. Indeed, in the Fourth,37 Fifth,38 and Sixth39
Circuits, limiting instructions or other safeguards must accom-
pany demonstrative exhibits even when they are merely used
or displayed in trial without being sent to the jury during
deliberations.

                       b. Case Law From
                          Other States
   Other states do not appear to have a unified approach to the
use of demonstrative exhibits in jury deliberations. Courts in
Massachusetts,40 Missouri,41 Pennsylvania,42 and Wisconsin43
leave the issue solely up to a trial judge’s discretion. Several
states allow demonstrative exhibits to be used during jury
deliberations when appropriate safeguards are in place. Ohio
requires limiting instructions.44 In Illinois, the trial judge can
send a demonstrative exhibit to the jury room once he or she


34	
      See, e.g., U.S. v. Possick, supra note 21; United States v. Warner, supra
      note 18.
35	
      See United States v. Bernard, supra note 33.
36	
      See U.S. v. Possick, supra note 21.
37	
      See, e.g., U.S. v. Johnson, supra note 18.
38	
      See, e.g., U.S. v. Ollison, 555 F.3d 152 (5th Cir. 2009); U.S. v. Ogba, 526
      F.3d 214 (5th Cir. 2008); U.S. v. Taylor, supra note 21.
39	
      See, e.g., U.S. v. Bray, supra note 13; United States v. Scales, supra
      note 18.
40	
      See Com. v. Walter, 10 Mass. App. 255, 406 N.E.2d 1304 (1980).
41	
      See State v. Yowell, supra note 18.
42	
      See Commonwealth v. Moore, 443 Pa. 364, 279 A.2d 179 (1971).
43	
      See State v. Olson, 217 Wis. 2d 730, 579 N.W.2d 802 (Wis. App. 1998).
44	
      See In re Estate of Lucitte, supra note 14.
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has determined that the exhibit is not prejudicial.45 Otherwise,
                                       ­
the majority of states have not addressed this issue.

                (ii) Application to Nebraska Law
                      a. Judicial Discretion of
                            Trial Courts
   As the foregoing discussion revealed, a common approach
taken by many courts in other jurisdictions to the use of
demonstrative exhibits in jury deliberations is to allow such
use at the trial judge’s discretion. This approach is consistent
with Nebraska jurisprudence, which frequently addresses evi-
dentiary matters to the trial judge’s discretion.
   [5] In Nebraska, “[a] trial judge has broad discretion over
the conduct of a trial.”46 It is the judge’s statutory duty to
“exercise reasonable control over the mode and order of inter-
rogating witnesses and presenting evidence.”47 The judge also
possesses “inherent powers” that “include the broad discretion
to make discovery and evidentiary rulings conducive to the
conduct of a fair and orderly trial.”48
   [6] In practice, a trial judge is called upon to make many
decisions during the course of a trial based upon this broad
discretion. The Nebraska Evidence Rules explicitly place
many evidentiary matters at the discretion of the trial judge.49
And the exercise of discretion “is implicit in decisions to
admit evidence based on relevancy or admissibility.”50 When
the Nebraska Evidence Rules commit the evidentiary ques-
tion at issue to the discretion of the trial court, an appellate
court reviews the admissibility of evidence for an abuse of

45	
      See People v. Manley, supra note 18.
46	
      Connelly v. City of Omaha, 278 Neb. 311, 319, 769 N.W.2d 394, 400
      (2009).
47	
      § 27-611(1).
48	
      Schindler v. Walker, 256 Neb. 767, 779, 592 N.W.2d 912, 920 (1999).
49	
      See, e.g., Neb. Evid. R. 104(1), Neb. Rev. Stat. § 27-104(1) (Reissue
      2008); Neb. Evid. R. 106(2), Neb. Rev. Stat. § 27-106(2) (Reissue
      2008); Neb. Evid. R. 201(3), Neb. Rev. Stat. § 27-201(3) (Reissue 2008);
      § 27-611(2); Neb. Evid. R. 705, Neb. Rev. Stat. § 27-705 (Reissue 2008).
50	
      Sack v. Castillo, 278 Neb. 156, 164, 768 N.W.2d 429, 436 (2009).
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discretion.51 In addition, a trial judge is given the discretion
to determine when a sufficient basis has been laid for lay
opinion testimony,52 when photographs can be admitted into
evidence,53 and when demonstrative exhibits can be used
in trial.54
   When it comes to matters regarding the jury, under Nebraska
case law, the trial judge has discretion to allow the jury to
reexamine evidence during deliberations.55 Under this rule,
“trial courts have broad discretion in allowing the jury to have
unlimited access to properly received exhibits that constitute
substantive evidence of the defendant’s guilt.”56
   [7] In accordance with this broad discretion already
accorded to trial courts, particularly in evidentiary matters,
we believe that the submission of demonstrative exhibits to
the jury during deliberations should be left to the discretion
of the trial court. Accordingly, we hold that a trial judge
may exercise his or her broad judicial discretion to allow
or disallow the use of demonstrative exhibits during jury
deliberations.
                     b. Limits of Discretion
   This discretion, however, is not unlimited. Despite their
potential usefulness, demonstrative exhibits also carry the
potential to prejudice the party against whom such exhibits
are used.
   If used improperly, demonstrative exhibits can distract the
jury from considering all of the evidence presented, causing
them instead to unfairly emphasize only portions of the evi-
dence.57 If all parties to a case do not submit demonstrative
exhibits, the jury may be tempted to focus more heavily on the

51	
      Erickson v. U-Haul Internat., 278 Neb. 18, 767 N.W.2d 765 (2009).
52	
      See Childers v. Phelps County, 252 Neb. 945, 568 N.W.2d 463 (1997).
53	
      See Steele v. Sedlacek, 267 Neb. 1, 673 N.W.2d 1 (2003).
54	
      See American Central City v. Joint Antelope Valley Auth., supra note 3.
55	
      See State v. Dixon, 259 Neb. 976, 614 N.W.2d 288 (2000).
56	
      State v. Pischel, 277 Neb. 412, 427, 762 N.W.2d 595, 607 (2009).
57	
      See, e.g., United States v. Abbas, 504 F.2d 123 (9th Cir. 1974); State v.
      Lord, supra note 14.
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evidence to which it has “easy reference.”58 Because they are
often prepared specifically for use in litigation, demonstra-
tive exhibits can be tempting vehicles for conveying prejudi-
cial language and assumptions59 or inadmissible evidence60 to
the jury.
   Furthermore, if not instructed on the limited purposes of
demonstrative exhibits, the jury may assume that demonstrative
exhibits constitute primary proof of the information contained
therein, leading the jury to shirk its duty to determine the truth
and accuracy of the evidence.61 The jury may attribute undue
weight or credibility to evidence summarized or illustrated in
demonstrative exhibits.62 Or a jury may find the simplicity with
which demonstrative exhibits present complex or technical
information to be compelling and persuasive.63 On the other
hand, demonstrative exhibits that are not properly explained
may ultimately confuse or mislead the jury.64

58	
      See, e.g., U.S. v. Casoni, 950 F.2d 893, 916 (3d Cir. 1991). Accord, United
      States v. Ware, 247 F.2d 698 (7th Cir. 1957); Steele v. United States, 222
      F.2d 628 (5th Cir. 1955); Thomas v. State, 259 Ind. 537, 289 N.E.2d 508
      (1972) (superseded by rule on other grounds as stated in Litherland v.
      McDonnell, 796 N.E.2d 1237 (Ind. App. 2003)).
59	
      See, e.g., U.S. v. Irvin, supra note 21; U.S. v. Taylor, supra note 21; United
      States v. Lemire, 720 F.2d 1327 (D.C. Cir. 1983) (superseded by statute
      on other grounds as stated in U.S. v. Sun-Diamond Growers of California,
      941 F. Supp. 1262 (D.D.C. 1996)); U.S. v. Gazie, Nos. 83-1851, 83-1852,
      83-1860, 1986 WL 16498 (6th Cir. Feb. 26, 1986) (unpublished disposition
      listed in table of “Decisions Without Published Opinions” at 786 F.2d
      1166 (6th Cir. 1986)); Vanlandingham v. Gartman, 236 Ark. 504, 367
      S.W.2d 111 (1963).
60	
      See, e.g., United States v. Lemire, supra note 59.
61	
      See, e.g., U.S. v. Baker, 10 F.3d 1374 (9th Cir. 1993), overruled on other
      grounds, U.S. v. Nordby, 225 F.3d 1053 (9th Cir. 2000); United States
      v. Scales, supra note 18; Baines v. United States, 426 F.2d 833 (5th Cir.
      1970); United States v. Ellenbogen, 365 F.2d 982 (2d Cir. 1966).
62	
      See, e.g., Sanchez v. United States, 293 F.2d 260 (8th Cir. 1961); Smith v.
      Ohio Oil Co., supra note 14.
63	
      See, e.g., U.S. v. Irvin, supra note 21; Elder v. United States, 213 F.2d 876
      (5th Cir. 1954).
64	
      See, e.g., United States v. Citron, 783 F.2d 307 (2d Cir. 1986); U.S. v.
      Gazie, supra note 59.
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	                                Cite as 286 Neb. 363

   [8] Given the possibility for such forms of prejudice, a
trial judge must carefully consider the potential prejudice that
may arise from the use of demonstrative exhibits during jury
deliberations. Each demonstrative exhibit must be considered
individually, because both the usefulness of a demonstrative
exhibit and the potential prejudice arising from its use will
depend on the form and substance of each particular exhibit.
We note that a trial court is already required to weigh these
considerations before allowing the use of demonstrative exhib-
its in trial.65 We now hold that the trial judge must do so again
before allowing the jury to use a demonstrative exhibit during
deliberations. It is an abuse of discretion for a trial judge to
send a demonstrative exhibit to the jury for use in delibera-
tions without first weighing the potential prejudice in allowing
such use against the usefulness of the exhibit and employing
adequate safeguards to prevent prejudice.

                    c. Common Safeguards
   Significantly, many of the dangers in allowing the use of
demonstrative exhibits in jury deliberations stem from the
improper use of such exhibits or a disregard for their limited
purpose. As such, these dangers often can be avoided by the
use of limiting instructions that advise a jury of the limited
purpose for which demonstrative exhibits should be employed.
As noted earlier, the limiting instruction is the most prevalent
safeguard used by the circuit courts. Moreover, several circuits
have held that limiting instructions can limit66 or even elimi-
nate67 the harms posed by demonstrative exhibits.
   In addition to jury instructions, there are other safeguards
that can be employed to limit the prejudice that will result
from allowing the jury to use demonstrative exhibits in delib-
erations. These safeguards include requiring the proponent of
the exhibit to lay foundation for its use outside the presence

65	
      See State v. Daly, supra note 6.
66	
      See, e.g., U.S. v. Bishop, 264 F.3d 535 (5th Cir. 2001); U.S. v. Francis, 131
      F.3d 1452 (11th Cir. 1997).
67	
      See, e.g., United States v. Cox, 633 F.2d 871 (9th Cir. 1980); Sanseverino
      v. United States, 321 F.2d 714 (10th Cir. 1963).
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380	286 NEBRASKA REPORTS



of the jury,68 having the individual who prepared the exhibit
testify concerning the exhibit,69 allowing extensive cross-­
examination of the individual who prepared the exhibit,70 giv-
ing the opponent of the exhibit the opportunity to examine the
exhibit prior to its admission and to identify errors,71 excising
prejudicial content prior to submitting the exhibit to the jury,72
and giving the opposing side the opportunity to present its
own exhibit.73
   As noted above, the prejudicial potential of any particular
demonstrative exhibit will vary depending on the exhibit.
Having presided over the presentation of evidence, the trial
judge should exercise sound discretion to ensure that adequate
safeguards are present to prevent that prejudice.
                         (d) Application to
                           Instant Appeal
   In the instant case, the district court employed no safeguards
against prejudice before allowing the jury to use exhibit 36
during its deliberations. Exhibit 36 was “admitted” for use dur-
ing trial in a pretrial conference, employed by the State in its
opening statement, and used repeatedly throughout the trial.
Yet, the court never informed the jury that exhibit 36 had been
admitted for demonstrative purposes only or explained the
proper purposes for which the jury might use a demonstrative
exhibit. Although the State erroneously informed the jury in its
opening statement that Pangborn had “stipulated” to exhibit 36,
the court did not correct the implication that Pangborn agreed

68	
      See, e.g., U.S. v. Baker, supra note 61; United States v. Lemire, supra note
      59; United States v. Bartone, 400 F.2d 459 (6th Cir. 1968).
69	
      See, e.g., United States v. Cox, supra note 67; United States v. Ware, supra
      note 58; Lloyd v. United States, 226 F.2d 9 (5th Cir. 1955); State v. Lord,
      supra note 14.
70	
      See, e.g., U.S. v. Baker, supra note 61; United States v. Lemire, supra note
      59; State v. Lord, supra note 14; State v. Olson, supra note 43.
71	
      See, e.g., U.S. v. Baker, supra note 61.
72	
      See, e.g., U.S. v. Irvin, supra note 21; Stachowiak v Subczynski, 411 Mich.
      459, 307 N.W.2d 677 (1981) (per curiam).
73	
      See, e.g., U.S. v. Baker, supra note 61; State v. Lord, supra note 14.
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	                             Cite as 286 Neb. 363

with the substantive content of the exhibit or take the opportu-
nity to instruct the jury regarding the proper use of the exhibit.
And even when submitting the case for the jury’s consideration
and sending all the exhibits to the jury room, the court failed
to provide a jury instruction that exhibit 36 was admitted for
demonstrative purposes only and specifically instruct the jury
as to the proper purpose for use of the exhibit. In effect, the
court gave the jury unlimited access to exhibit 36—a clear and
concise “road map” of the State’s entire case against Pangborn
and upon which the State had relied significantly during the
presentation of evidence—without limiting or guiding the
jury’s use of that exhibit.
   We conclude that the district court abused its discretion in
permitting the jury to use exhibit 36 during its deliberations
without providing a limiting instruction. That is not to say
that a limiting instruction is always required; however, except
in the rare case where other safeguards combine to make the
limited purpose of the demonstrative exhibit abundantly clear
to the jury, an appropriate limiting instruction will be necessary
to avoid unfair prejudice.

                        (e) Harmless Error
                              Analysis
   [9-12] Errors, other than structural errors, which occur
within the trial and sentencing process, are subject to harmless
error review.74 Harmless error exists when there is some incor-
rect conduct by the trial court which, on review of the entire
record, did not materially influence the jury in reaching a ver-
dict adverse to a substantial right of the defendant.75 In a jury
trial of a criminal case, an erroneous evidentiary ruling results
in prejudice to a defendant unless the State demonstrates that
the error was harmless beyond a reasonable doubt.76 Harmless
error review looks to the basis on which the trier of fact actu-
ally rested its verdict; the inquiry is not whether in a trial that

74	
      State v. Pathod, 269 Neb. 155, 690 N.W.2d 784 (2005).
75	
      State v. Ford, 279 Neb. 453, 778 N.W.2d 473 (2010).
76	
      Id.
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occurred without the error a guilty verdict would surely have
been rendered, but, rather, whether the actual guilty verdict
rendered in the questioned trial was surely unattributable to
the error.77
   Due to the complete absence of safeguards employed in
the instant case when erroneously submitting the demonstra-
tive exhibit to the jury, we cannot say that this error was
harmless. Because the jury was never informed that exhibit
36 was admitted for only demonstrative purposes, it had no
way of knowing that the standard instruction on exhibits
admitted for limited purposes applied to the exhibit. And
without any sort of guidance from the district court, the jury
did not know that exhibit 36 was not substantive evidence of
Pangborn’s guilt.
   The State argues that the jury’s acquittal of Pangborn on 1
of 10 counts reflects that “the jury was not unduly influenced
by Exhibit 36.”78 We find this argument to be logically flawed.
Even assuming that the acquittal on one count shows that the
jury did not take exhibit 36 as proof of Pangborn’s guilt on that
single count, each count was based on separate factual allega-
tions. A verdict of “not guilty” on one count has no relation
to the other counts and does not preclude the possibility that
exhibit 36 substantially influenced the jury’s decision on the
other counts.
   We cannot say that the jury’s guilty verdicts were surely
unattributable to the act of sending exhibit 36 to the jury dur-
ing deliberations without a proper limiting instruction. We
reverse Pangborn’s convictions and remand the cause for a
new trial.
                         2. New Trial
   [13] The Double Jeopardy Clauses of the federal and state
Constitutions do not forbid a retrial after an appellate deter-
mination of prejudicial error in a criminal trial so long as the
sum of all the evidence admitted by the trial court, whether
erroneously or not, would have been sufficient to sustain a

77	
      State v. Scott, 284 Neb. 703, 824 N.W.2d 668 (2012).
78	
      Brief for appellee at 11.
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	                           Cite as 286 Neb. 363

guilty verdict.79 Having reviewed the entirety of the evidence
admitted in this case, we note that numerous individuals
testified that they witnessed the crimes of which Pangborn
was charged. There also was evidence that called into ques-
tion Pangborn’s alibi defense. We find that there was suffi-
cient evidence to sustain the verdict on each count where he
was found guilty. Therefore, retrial is permissible on those
nine counts.

                      3. Other Assignments
                             of Error
    [14] Having found that the district court’s decision to allow
the jury to use exhibit 36 during deliberations without a limit-
ing instruction or other safeguards was reversible error, we
do not reach any of Pangborn’s other assignments of error.
An appellate court is not obligated to engage in an analysis
that is not necessary to adjudicate the case and controversy
before it.80
    [15] Because we do not believe that the evidentiary founda-
tion for exhibits 37 and 38 will be identical upon retrial, we do
not discuss Pangborn’s arguments regarding these two exhibits.
An appellate court may, at its discretion, discuss issues unnec-
essary to the disposition of an appeal where those issues are
likely to recur during further proceedings.81 We think it is quite
likely upon retrial and in the light of Pangborn’s arguments in
this appeal that the State may choose to offer other or addi-
tional foundational evidence in support of these exhibits. Thus,
it is unlikely that the issues will arise in the same posture, and
we decline to address the issue.

                       VI. CONCLUSION
   We hold that a trial judge may exercise his or her broad
judicial discretion to allow or disallow the use of demonstra-
tive exhibits during jury deliberations. But given the prejudice

79	
      State v. Riley, 281 Neb. 394, 796 N.W.2d 371 (2011).
80	
      Pearson v. Archer-Daniels-Midland Milling Co., 285 Neb. 568, 828
      N.W.2d 154 (2013).
81	
      State v. Smith, 284 Neb. 636, 822 N.W.2d 401 (2012).
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that can arise from the use of demonstrative exhibits in jury
deliberations, this discretion is not unlimited. Due to the lack
of limiting instructions and the complete absence of safeguards
employed in the instant case, the district court abused its dis-
cretion in allowing the jury to use the State’s “road map” of
its case—admitted for demonstrative purposes only—during
deliberations without giving a limiting instruction. We find this
error to be prejudicial. Therefore, we reverse the judgment and
remand the cause for a new trial.
                     R eversed and remanded for a new trial.
   Connolly and Miller-Lerman, JJ., participating on briefs.
