WILLIAM M. GILDAY, JR. vs. COMMONWEALTH (and a companion case [Note 1]).

HENNESSEY, J. The petitioners (hereinafter called the

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defendants) await trial on indictments for murder and armed robbery. Their petitions in the county court under G. L. c. 211, Section 3, as amended, were reserved and reported, without decision, to the full court. The defendants seek to vacate orders of a Superior Court judge, entered upon motions of the Commonwealth, that each defendant prior to trial disclose whether he intends to interpose (1) a defence of not guilty by reason of insanity, or (2) a defence of alibi, and if so, the names, addresses, and dates of birth of witnesses he intends to produce in support of such defence.

This matter is not within the scope of review under G. L. c. 278, Section 28E (interlocutory appeals in criminal cases). The judge denied the defendants' motions that he report to this court his rulings. See G. L. c. 278, Section 30A. He, however, deferred compliance with the orders until the defendants could obtain this court's decision.

Only in the most exceptional circumstances will we review interlocutory rulings in criminal cases under our general superintendence powers. See G. L. c. 211, Section 3, as amended. We do so here because of important practical issues presented, and because ordering the disclosure of alibi witnesses, if error, might be irremediable, and possibly not curable even by a new trial since the defendants could not thereafter be placed in statu quo.

We recognize the judge's reasons for entering the rulings. The defendants here are two among several defendants charged with serious crimes which have been the subject of extensive publicity in the news media. It is likely that the judge will sequester the jurors during trial. Severance of the trials of these two defendants has already been ordered. There is the prospect of two or more successive, lengthy trials, each with a locked up jury. If the prosecution is informed that a defendant intends to present alibi or insanity evidence only when or after the prosecution rests, the prosecution is likely to request a suspension of trial to gather evidence to rebut the defence, a task difficult at best upon such short notice. Clearly implied in the orders is the judge's desire to avoid unnecessary and foreseeable delays.

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Federal constitutional questions are argued concerning which the pertinent decisions are far from clear. Compelling a defendant to disclose before trial the identity of his alibi witnesses has been held not to violate his privilege against self-incrimination, partly on the reasoning that there is no compulsion since the defendant has the alternative of abandoning the alibi defence and that such an order merely advances the date upon which he necessarily will make disclosure in any event. Williams v. Florida, 399 U.S. 78, 83-85. Radford v. Stewart, 320 F. Supp. 826, 831 (D. Mont.). State v. Stump, 254 Iowa, 1181, 1197-1198, cert den. sub nom. Stump v. Iowa, 375 U.S. 853. State v. Angeleri, 51 N. J. 382, 385, cert. den. sub nom. Angeleri v. New Jersey, 393 U.S. 951. Commonwealth v. Vecchiolli, 208 Pa. Super. 483, 489. However, in Williams v. Florida, supra, 81-82, there is a suggestion that to require a defendant to disclose his alibi witnesses may deny him due process in a State such as Massachusetts which does not by statute or rule of court provide appropriate, compulsory and reciprocal disclosure by the prosecution. [Note 2]

Constitutional problems also may be argued concerning the enforcement of any order for pre-trial disclosures where the defendant stands mute after the order or seeks to change his position during trial after originally disclaiming any intention to assert such a defence. Probably the only effective measure to enforce the order in such instance is to exclude at trial the defendant's offer of evidence in these areas of defence. [Note 3] A number of jurisdictions have held that such

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exclusions of evidence are valid. [Note 4] Recently, however, there have been suggestions that such exclusions may violate the defendant's Sixth Amendment right to summon witnesses in his own behalf. Williams v. Florida, 399 U.S. 78, 83. Radford v. Stewart, 320 F. Supp. 826, 828, 830 (D. Mont.).

Until the constitutional uncertainties in this area are more definitely settled, we regard it as inexpedient to approve so much of the orders as requires the pre-trial disclosure of alibi witnesses. Particularly is this true in view of the uncertainty whether such pre-trial disclosure may be required only where the defendants are afforded reciprocal compulsory discovery, for which Massachusetts does not now provide either by statute or rule of court. Practical considerations require that, as long as the law remains uncertain, defendants should not be ordered to identify alibi witnesses in advance of trial at least until appropriate discovery procedures can be established.

In each case so much of the judge's orders as requires the defendant to disclose before trial the names, addresses and dates of birth of his witnesses in the event he intends to rely on the defence of alibi is vacated and an entry is to be made denying that portion of the motions. The remainder of the order in each case is to stand.

So ordered.