
383 Mich. 402 (1970)
175 N.W.2d 767
PEOPLE
v.
PENA.
Calendar No. 7, Docket No. 52,017.
Supreme Court of Michigan.
Decided April 13, 1970.
Frank J. Kelley, Attorney General, Robert A. Derengoski, Solicitor General, George E. Thick, II, Prosecuting Attorney, and H. Michael Dwan, Assistant Prosecuting Attorney, for the people.
George H. La Plata, for defendant on appeal.
T.G. KAVANAGH, J. (for reversal and remand).
Ramon Pena was convicted of selling narcotic drugs without a license[1] and sentenced to a prison term of 20 to 25 years.
Within ten days after the arraignment, defendant's counsel gave notice of intent to claim an alibi and listed as witnesses Manuala Garza, Irene Bustinza and Nickhol Pena. On April 9, 1964, six days *405 before the case was set for trial, an assistant prosecuting attorney for Saginaw county wrote to each of the witnesses on official stationery the following letter:
"Dear Madam:
In the interests of justice I am quoting Michigan Statutes Annotated 28.644,[2] which provides as follows:
`Any person who, being lawfully required to depose truth in any proceeding in a court of justice, shall commit perjury shall be guilty of a felony, punishable, if such perjury was committed on the trial of an indictment for a capital crime, by imprisonment in the state prison for life, or any term of years, and if committed in any other case, by imprisonment in the state prison for not more than fifteen (15) years.'
                                 Very truly yours,
                                 G.E. THICK
                                 Assistant Prosecuting Attorney"
Before the jury was impaneled, the defendant's counsel moved to dismiss the charges on the ground that the prosecutor's "letter" violated the Fourteenth Amendment of the United States Constitution by intentionally intimidating the defense witnesses.
After listening to argument on the motion the trial judge concluded:
"The Court: Well, let me just say that the court definitely does not approve of this procedure. It is the first time that I have ever seen this technique used. I did discuss the matter with the prosecutor yesterday and was informed that he knew not of this procedure.
"I surely hope that this will be the last time that the procedure will be used.
"I will at this time deny the motion, although I indicated that I do not approve of the procedure. I *406 do not feel that this will prevent the defendant from having a fair and impartial trial in this case.
"It is a matter which could be brought to the attention of the witness or any witnesses as they take the stand by the court, and, of course, as all witnesses are to understand that they are to tell the truth, the whole truth and nothing but the truth as they testify in this very serious matter.
"The motion will be denied."
We do not consider this adequate.
The impact of the prosecutor's official letter talking about life imprisonment to these poorly-educated Spanish-speaking people could scarcely be calculated to be anything but terrifying.
For the court to conclude that the defendant could have a fair trial without directly questioning the witnesses, without ascertaining the effect of the letter and without attempting to reassure them, if possible, is not acceptable.
The Constitutional right of a defendant to call witnesses in his defense[3] mandates that they must be called without intimidation. The manner of testifying is often more persuasive than the testimony itself.
A prosecutor may impeach a witness in court but he may not intimidate him  in or out of court.
As the trial court recognized, this "procedure" is indefensible. Because we are convinced that the court alone might have corrected the prosecutor's actions, but did not, we must set aside the conviction.
Upon retrial the court's efforts to undo the damage should appear of record.
Reversed and remanded.
KELLY and T.M. KAVANAGH, JJ., concurred with T.G. KAVANAGH, J.
*407 ADAMS, J. (for remand).
I would remand to the trial court for a determination by that court as to whether or not the prosecutor's letter did intimidate the witnesses. If the court finds it did, the court should grant a new trial and the court's efforts to undo the damage upon such retrial should appear of record. If the court finds that no intimidation took place, the court should so find, stating its reasons for the finding, and a new trial should be denied.
I vote to remand for a hearing as proposed above.
T.E. BRENNAN, C.J., concurred with ADAMS, J.
DETHMERS, J. (for affirmance).
The opinion of Mr. Justice THOMAS GILES KAVANAGH in this case neglects to include in its statement of facts that of the three persons listed as witnesses by the defendant in his notice of intent to claim an alibi, two of them were called by defendant as witnesses, at trial, that both actually did testify in support of his claim of alibi, and that defendant did not call the third one at trial, but the prosecution did and such witness professed to be unable to remember her whereabouts at the time in question. No claim is made by the defendant, on appeal, nor is it suggested in Justice KAVANAGH'S opinion, that the memory or testimony of the latter witness was in any way affected by the letter sent to her by the prosecuting attorney.
It is obvious that the testimony of the two witnesses called by defendant was not affected by the letter sent to them inasmuch as they testified in full support of his alibi claim. How, then, can it be said "that the prosecutor's `letter' violated the Fourteenth Amendment * * * by intentionally intimidating the defense witnesses" and that defendant was thus deprived of a fair trial? The witnesses, whatever their state of mind or pulse rate, gave defendant *408 the testimony he wanted. He was deprived of nothing.
At this point reference may be made to our decision in the recent case of People v. Wein (1969), 382 Mich 588, in which we held that it was not reversible error in a criminal case for the trial judge to caution the defendant that a penalty attaches to perjury. Witnesses are required, on trial, to take the oath to tell the truth and to do so. That to testify falsely may constitute perjury punishable by contempt proceedings or otherwise need not be kept secret from a witness as a prerequisite to a fair trial.
As appears from Mr. Justice T.G. KAVANAGH'S opinion, it apparently was defense counsel's theory that the sending of the letters by the prosecutor entitled the defendant, in advance of trial, to dismissal of the charges. Nothing could be more preposterous. Defendant had a fair trial. His conviction should be affirmed.
BLACK, J., concurred with DETHMERS, J.
ORDER OF THE COURT
This cause having been brought to this Court by appeal from the Court of Appeals, and having been argued by counsel and due deliberation had thereon, it is now ordered that the cause be remanded to the Circuit Court for the County of Saginaw for a determination by that court as to whether or not the prosecutor's letter did intimidate the witnesses. If the court finds it did, the court will grant a new trial and the court's efforts to undo the damage upon such retrial shall appear of record. If the court finds that no intimidation took place, the court will so find, stating its reasons for the finding, and a new trial will be denied.
NOTES
[1]  PA 1952, No 266 (MCLA § 335.152 [Stat Ann 1957 Rev § 18.1122]).
[2]  CL 1948, § 750.442 (Stat Ann 1954 Rev § 28.644).  REPORTER.
[3]  US Const, Am 3; Mich Const 1963, art 2, § 20.
