231 F.3d 1025 (6th Cir. 2000)
Stewart Barnes,  Petitioner-Appellant,v.Frank Elo,  Respondent-Appellee.
No. 99-1784
UNITED STATES COURT OF APPEALS FOR THE SIXTH CIRCUIT
Argued: October 24, 2000Decided and Filed: November 9, 2000

Appeal from the United States District Court for the Eastern District of Michigan at Ann Arbor.  No. 97-60150--George C. Steeh, District Judge.[Copyrighted Material Omitted]
Kenneth P. Tableman, Lansing, Michigan, Stewart Barnes, Jackson, Michigan, for Appellant.
Vincent J. Leone, ASSISTANT ATTORNEY GENERAL, Lansing, Michigan, for Appellee.
Before: MARTIN, Chief Judge; NORRIS, Circuit Judge; FORESTER, District Judge*.
OPINION
BOYCE F. MARTIN, JR., Chief Judge.


1
Stewart Barnes, a state prisoner, appeals the district court's denial of his petition  for a writ of habeas corpus pursuant to 28 U.S.C. §2254 on the grounds that he received ineffective assistance of counsel in  violation of the Sixth Amendment. For the following reasons, we vacate the ruling of the district court and remand for a  hearing on the competence of Barnes's trial counsel.

I.

2
Barnes was convicted on the eyewitness testimony of the then twelve-year old complainant. The complainant testified  that after going to bed around 3:30 a.m. on July 29, 1990, she was awakened by an unidentified man kissing the side of her  face. After a struggle, the suspect ran down the stairs and out of the house. The complainant's mother also testified to seeing  a man running down the stairs and out the door. Although both the complainant and her mother ran after the suspect, they  were unable to catch him. The initial report given by the complainant did not state that the suspect had a limp, but on a later  occasion the complainant told an officer that her assailant had a limp.


3
At the bench trial, the parties stipulated that Barnes suffers from post-polio syndrome and wears a brace on his leg. This  was the only medical evidence presented at trial. Barnes's trial counsel filed an alibi notice, but no alibi witness testified at  trial. Barnes was convicted of breaking and entering with intent to commit criminal sexual conduct, assault with intent to  commit second degree criminal sexual conduct, and felonious assault. He was sentenced to concurrent terms of six to  fifteen years on the breaking and entering, three to five years on the assault with intent to commit second degree criminal  sexual conduct, and two and a half to four years on the felonious assault.


4
After his conviction, Barnes made a timely motion to remand for an evidentiary hearing, known in Michigan as a Ginther hearing1 , claiming ineffective assistance of trial counsel for failure to call medical witnesses to testify to Barnes's  inability to run and failure to call two alibi witnesses. Although the record is not entirely clear, it appears that Barnes did  submit supporting medical reports by Dr. William Waring, Barnes's treating physician. On September 7, 1993, two weeks  after the due date, Barnes's appellate counsel filed a supplement to the motion to remand consisting of an affidavit from Dr.  Waring which stated that he had not been contacted by Barnes's trial counsel, that he would have been available to testify,  and that he would have testified that Barnes was physically unable to run down the stairs and out the door as the  complainant testified her assailant had done. The Michigan Court of Appeals denied the order to remand "for failure to  persuade the court of the necessity of a remand at this time," People v. Barnes, No. 153885 (Mich. Ct. App. Sept. 28,  1993), and the Michigan Supreme Court denied leave to appeal this order. People v. Barnes, No. 97871 (Mich. Mar. 29,  1994). It is unclear whether either courtconsidered Dr. Waring's affidavit in denying Barnes an evidentiary hearing.


5
The Michigan Court of Appeals denied Barnes's direct appeal of his conviction, stating that despite the fact that a Ginther hearing was not held, Barnes was not denied effective assistance of counsel at trial. People v. Barnes, No. 153885  (Mich. Ct. App. Mar. 2, 1995). The court continued that while Barnes "was given the opportunity to file an affidavit [to  support his motion to remand]. . . [he] failed to avail himself of this opportunity" and therefore "there is no evidence  properly before this [c]ourt to affirmatively support defendant's claim that he is incapable of running." Barnes filed a timely  motion for a rehearing, stating in part that Dr. Waring's affidavit was filed as a supplement to the motion to remand, but  rehearing was denied by the Michigan Court of Appeals and the Michigan Supreme Court.


6
On June 9, 1999 the district court denied Barnes's petition for a writ of habeas corpus. Agreeing that trial counsel was  not ineffective, the district court merely noted that Dr. Waring's affidavit arrived after the deadline and stated that "[t]here  is no indication . . . that the court of appeals did not consider Dr. Waring's affidavit when ruling on [Barnes's] appeal." The  district court continued that because the court of appeals had the affidavit when it denied the motion for rehearing, "the  court of appeal's [sic] ruling was not a [sic] unreasonable application of clearly established federal law."

II.
A.

7
Because ineffective assistance of counsel is a mixed question of law and fact, the state court's determination that Barnes  received effective assistance of counsel is reviewed de novo. See Sims v. Livesay, 970 F.2d 1575, 1579 (6th Cir. 1992).  District court findings of fact are reviewed for clear error. See Carter v. Sowders, 5 F.3d 975, 978 (6th Cir. 1993).


8
Federal habeas review of the state court's decision is governed by the standards set forth in the Antiterrorism & Effective  Death Penalty Act of 1996. The Act applies to this case because Barnes filed his habeas corpus petition after the effective  date of the Act. See Lindh v. Murphy, 521 U.S. 320 (1997). Section 2254(d) of the Act provides, in relevant part, that a  federal court shall not grant a petition for a writ of habeas corpus unless the state court adjudication of the claim "resulted  in a decision that was contrary to, or involved an unreasonable application of, clearly established Federal law, as  determined by the Supreme Court of the United States." 28 U.S.C. § 2254(d)(1). This section applies to mixed questions of  law and fact. See Harpster v. Ohio, 128 F.3d 322, 326 (6th Cir. 1997).


9
Williams v. Taylor clarified that an "unreasonable application" occurs when "the state court identifies the correct legal  principle from this Court's decisions but unreasonably applies that principle to the facts of the prisoner's case." Williams v.  Taylor, 120 S.Ct. 1495, 1523 (2000). The inquiry is "whether the state court's application of clearly established federal law  was objectively unreasonable." Id. at 1521. Additionally, we may only look to decisions of the Supreme Court of the United  States when determining "clearly established federal law." Williams v. Taylor, 120 S.Ct. at 1523; Harris v. Stoval, 212 F.3d  940, 944 (6th Cir. 2000) (noting that "it was error for the district court to rely on authority other than that of the Supreme  Court of the United States in its analysis under section 2254(d)").


10
The standards for determining claims of ineffective assistance of counsel set forth in Strickland v. Washington, 466 U.S.  668 (1984), are clearly established federal law. See Williams v. Taylor, 529 U.S. 362 at___, 120 S.Ct. at 1512. Strickland requires a defendant to  show that counsel's performance was deficient and that counsel's deficient performance prejudiced the defense such that the  defendant was denied a fair trial. Strickland, 466 U.S. at 687. Scrutiny must be highly deferential, and we must indulge the  presumption that trial counsel provided reasonable professional assistance. Id at 689.

B.

11
Barnes argues that he was denied effective assistance of counsel by his trial attorney's failure to investigate or call a  medical witness to establish Barnes's inability to run in the manner that the complainant testified her assailant had run. It is  unclear from the record whether or to what extent trial counsel investigated Barnes's medical condition, and why he failed  to contact Dr. Waring. Absent an evidentiary hearing and clear finding of fact, it is impossible to determine whether trial  counsel's failure to investigate and call Dr. Waring was sound trial strategy, see Strickland, 466 U.S. at 690-91 ("Strategic  choices made after thorough investigation of law and facts relevant to plausible options are virtually unchallengeable; and  strategic choices made after less than complete investigation are reasonable precisely to the extent that reasonable  professional judgments support the limitations on investigation."), or was constitutionally deficient performance. See id. at  691 ("Counsel has a duty to make reasonable investigations or to make a reasonable decision that makes particular  investigations unnecessary."). Given Dr. Waring's ability to testify that Barnes was incapable of running as the complainant  described, he certainly would have been an essential witness. Without an evidentiary hearing, we cannot meaningfully  review whether the Michigan state courts' determination that Barnes's trial counsel was not ineffective for failing to call a  medical witness was an unreasonable application of Strickland.

III.

12
Because Barnes never received an evidentiary hearing and consequently the record before us fails to clarify facts central  to the determination of whether the adjudication of Barnes's claim by the Michigan state courts "resulted in a decision that  was contrary to, or involved an unreasonable application of, clearly established federal law, as determined by the Supreme  Court," we VACATE the ruling of the district court and REMAND for a hearing on the competency of Barnes's trial  counsel.



Notes:


*
  The Honorable Karl S. Forester, United States District Judge for the Eastern District of Kentucky, sitting by  designation.


1
  People v. Ginther, 390 Mich. 436 (1973).


