A Berkshire County grand jury on October 4, 1978, indicted the defendant Edward H. Hughes on two counts of assault by means of a dangerous weapon, to wit, a pistol (G. L. c. 265, § 15B). The charges arose from an incident in Otis, Massachusetts, on June 21, 1978, when the defendant allegedly assaulted John Joyner and Leonard Ter *584 ranova by firing two rounds through the front windshield of a truck in which the men were sitting. 1 Inspection of a recovered bullet suggested that it came from either a .38 caliber or .357 magnum handgun. On June 22, 1978, the Otis chief of police asked the defendant whether he owned either kind of gun and, if so, whether he would surrender it voluntarily for examination. The defendant produced a .357 magnum pistol. Tests showed it had not been recently fired. The defendant refused consent to a search of his car, which was impounded at the time, for any additional weapon. However, the police on June 22 obtained a warrant for search of the car for “ [ejither a 38 calibre or 357 Magnum pistol and spent shells from either.” Police executed the warrant that day and made the return: “ Nothing pertaining to warrant found.”
The defendant pleaded not guilty on October 10, 1978, and was released on personal recognizance. Customary defense motions followed. On March 28, 1979, the Commonwealth filed a “ Motion to Order Defendant to Produce Weapon” for ballistics examination. The weapon was described in the motion as a “Smith and Wesson .38 Caliber Revolver Serial Number J354354.” An accompanying affidavit stated that the defendant had registered the revolver with the firearms identification division of the Department of Public Safety. This was apparently under G. L. c. 140, § 128B; and we note that pursuant to § 129C such a registrant must report to the division any sale, gift, or other transfer of possession of the weapon; failure to do so is criminally punishable (G. L. c. 269, § 10 [h]). The motion was allowed after hearing: the defendant was ordered to produce the described revolver within ten days; the Commonwealth was ordered to give the defendant a copy of any ballistics test results within ten days of receiving them; and “[a]ny question concerning the admissibility of evidence emanat *585 ing from the allowance of this motion is deferred to the trial justice, if appropriately raised.”
The defendant attempted to secure immediate review of the order by applying to a single justice of this court to exercise our supervisory power, G. L. c. 211, §§ 3 and 4A, claiming that the judge’s order, if enforced, would violate his constitutional privilege against self-incrimination. 2 The single justice denied the application on July 6,1979, observing that regular review could be had on an appeal from an adjudication of contempt for failure to comply with the order, or, if the indictments went to trial, then on appeal from a judgment of conviction, with error claimed in the trial judge’s refusal to exclude the gun “and all evidence derived from the production thereof.”
On July 27, 1979, the Commonwealth demanded by registered letter that the defendant turn over the gun within twenty-four hours or face contempt charges. On the defendant’s failure to reply, the Commonwealth on August 21, 1979, instituted proceedings for contempt which were brought to hearing on August 30. A representative of the firearms identification division testified that on March 23, 1976 (twenty-seven months before the alleged assault) the defendant had registered the gun described, and had not since then filed any report of transfer of the gun. In his findings, ruling, and order of August 30, 1979, the judge found that the defendant had purchased the revolver on March 23, 1976, and had not filed any further report. The *586 defendant was held in contempt but given until 3 p.m. that day to produce the weapon or show present inability to do so, otherwise he would be incarcerated until purgation or further order of the court. Sentence being stayed by the judge, the parties applied jointly for direct appellate review, which we allowed. We reverse.
1. The Fourth Amendment question. The defendant’s contention, as expressed in the court below and in the joint application to this court, rested on the Fifth Amendment. But he now ventures to say in a footnote in his brief that the order “may . . . have . . . violated” his right under the Fourth Amendment 3 to be free of unreasonable searches and seizures, for it sought, he suggests, “to probe the Defendant’s mind” which is “per se unreasonable.” (Defendant’s emphasis.) There are no supporting citations. We deal with the Fourth Amendment only to indicate that it may be put to one side in the present case.
A person may complain of a search warrant, and thus of the seizure of material obtained by the search, on the ground that the warrant was issued without probable cause or was indefinite, obscure, or overly broad in its description of the things to be taken or the place to be searched. A warrant defective in any such respect would lead to a search or seizure unreasonable in the sense of entailing an undue invasion of personal privacy by government agents. This is the familiar terrain of the Fourth Amendment. Of course, if objections of this order fail, material may be brought in and used that may be, and usually is, of an incriminating character, but the person involved has not been required to assist in the production.
In the present case of a motion addressed to a person to produce a physical object (similar to a subpoena duces *587 tecum) the objection is not that there is lack of cause for seeking the production — i.e., that the investigatory effort is illegal — or that the object sought is irrelevant to the inquiry or is insufficiently described. 4 Rather the objection is, precisely, that the defendant’s assistance is demanded — assistance in a testimonial sense. That is what the defendant means by “mind probe.” He is required under the order himself to produce the gun and thereby, he argues, make a series of important avowals with an incriminating tendency (discussed particularly in our point 2 below), or to explain his inability to comply. So the grievance, if there is one, fits under the Fifth Amendment, not the Fourth.
There are situations of subtle interaction between the Fourth and Fifth Amendments, for example, where the very object sought is a “speaking” object, say a statement, voluntarily written, which tends by its internal content to incriminate the writer, who is the person ordered to produce the writing. See generally
Couch
v.
United States,
2. Fifth Amendment analysis. So the defendant must justify what would otherwise be contumacy by reference to his privilege not to be “compelled . . . to be a witness against *588 himself” (or the counterpart State constitutional provision). But in the present case we do not have the prototypical compelled oral testimony. Under compulsion of the order the defendant could produce the weapon without uttering a word.
In one sense the distinction between the two forms of production — a statement in audible prose and an implicit statement — appears to be of no consequence because the protection of the privilege extends to “an accused’s communications, whatever form they might take.”
Schmerber
v.
California,
The upshot is that we have to say here whether the defendant’s producing the revolver would have sufficient testimonial aspects to initiate Fifth Amendment consideration and whether in those aspects there can be found a tendency to incriminate him. “These questions perhaps do not lend themselves to categorical answers; their resolution may instead depend on the facts and circumstances of particular cases or classes thereof.” Fisher v. United States, supra at 410. But for guidance we look primarily to Schmerber and Fisher.
In
Schmerber
the Supreme Court upheld against constitutional attack the use as evidence, in a prosecution for drunken driving, of laboratory analysis of a blood sample taken from the defendant against his will. Although the submission to the physical act was involuntary, and the test results incriminating, there was, according to the Court, “ [n]ot even a shadow of testimonial compulsion upon or enforced communication by the accused.”
Later cases applied the
Schmerber
reasoning to uphold the forcing of voice exemplars
(United States
v.
Wade,
Fisher took up the Schmerber analysis to see where it led in a case of production of documents compelled from one other than the writer. 6 The I.R.S., after interviewing certain taxpayers regarding possible civil or criminal infractions of the tax laws, learned that these persons had retrieved some of their accountants’ work papers (which laid out analyses of the taxpayers’ income and disbursements related to the years under investigation), and had passed the papers to their attorneys. Summons was then served on the attorneys to produce the work sheets. The issue reduced to whether the taxpayers themselves had a Fifth Amendment privilege to refuse production of the papers. 7 On the particular facts, the Court held against the taxpayers.
The Court recognized that two kinds of testimonial assertions were implied in the production. First, “producing the documents tacitly admits their existence and their location
*590
in the hands of their possessor.”
Fisher, 425
U.S. at 411-412. Second, the production implicitly authenticated the papers as being those requested in the summons.
Id.
See
People
v.
Defore, 242
N.Y. 13, 27 (1926) (Cardozo, J.). Why, then, was the claim of privilege denied? The elements of existence, location, and control of the papers were “not in issue”; “ [t]he existence and location of the papers are a foregone conclusion and the taxpayer adds little or nothing to the sum total of the Government’s information by conceding that he in fact has the papers.”
The converse inference from
Fisher,
as indicated by the Court,
8
is that assertions implied from production of things (whether or not documents) are within the Fifth Amendment, and thus justify the refusal to produce, when they are nontrivial and incriminating. Remitting to a footnote cases that do not directly test this inference — cases like
Fisher
on their facts, and so requiring the production
9
— we cite recent decisions which verify the inference and illustrate it. As for the implicit admission of existence, location, or control, even before
Fisher
the Seventh Circuit in
United States
v.
Campos-Serrano,
In
In re Bernstein,
The present case is consonant with those just cited. If the defendant should produce the revolver, he would be making implicitly a statement about its existence, location, and control to which the Commonwealth says it would allude at trial to show he had possession and control at some point after the alleged crime. The implied statement would also function as an authentication. See
Curcio
v.
United States,
*593
The avowals sought from the defendant are not only significant but must be taken to be incriminating. The revolver is the supposed instrumentality of the crime, and control or possession after the event, taken together with the earlier ownership attested by the registration, would tend to establish possession at the critical time. It is partially on this declared theory that the Commonwealth has pursued the defendant with its motion to produce. The Commonwealth states that once it has the revolver in hand, it will run ballistics tests, and these may lead to expert testimony, of whatever strength, tying the revolver to the actual assault. This is a step beyond the production sought, but the constitutional privilege “does not merely encompass evidence which may lead to criminal conviction, but includes information which would furnish a link in the chain of evidence that could lead to prosecution . . . .”
Maness
v.
Meyers,
By way of rebuttal the Commonwealth appears to be making the argument that the defendant may properly be ordered to produce the gun because — so it claims — enough independent evidence already is available against him to prove beyond a reasonable doubt that he had the gun on the date of the alleged offense. The Commonwealth does not simply assert that the evidence to be gained by pro *594 duction is here inconsequential or nonincriminating; rather it says that the evidence is unworthy of Fifth Amendment protection because it merely enhances other persuasive evidence obtained without the defendant’s help. The Commonwealth’s argument is indeed curious. It is as if we were asked to rule that a confession could be coerced from an accused as soon as the government announced (or was able to show) that at a future trial it could produce enough independent evidence to get past a motion for a directed verdict of acquittal. This would be to encourage present infringements of the Constitution on the excuse that they might or would be held “harmless” after trial and conviction.
The Commonwealth has not attempted to eliminate, as far as it could, the testimonial aspects of the defendant’s producing the gun, by the expedient of undertaking that at trial it would authenticate the gun simply by the serial number (if that number appears), and would make no tender in the court room of the fact that it was the defendant who produced the gun. We go no further than to express doubt whether the case would have been materially altered by an offer of such an undertaking in the court below. Compare
United States
v.
Authement,
The conclusion we reach in this case follows from basic policies supporting the constitutional guaranty. As was said in
Couch
v.
United States,
The order directing the defendant to produce, and the subsequent order adjudging him in contempt, were in error and are vacated.
So ordered.
Notes
These circumstances appear from an affidavit supporting an application for a search warrant which is added to the appellate record by consent of the parties.
The Commonwealth has not argued that the defendant’s voluntary surrender of one gun waived any Fifth Amendment rights he might have to refuse surrender of another. Cf.
Rogers
v.
United States,
Of course these Amendments bear on the States through the Fourteenth Amendment. See
Malloy
v.
Hogan, 378
U.S. 1 (1964) (Fifth Amendment);
Mapp
v.
Ohio,
A claim of indefiniteness or the like would invoke protections deriving from the Fourth Amendment. See
Fisher
v.
United States,
For a summary of the case law and suggested interpretations, see Note, Formalism, Legal Realism and Constitutionally Protected Privacy Under the Fourth and Fifth Amendments, 90 Harv. L. Rev. 945 (1977); Note, The Life and Times of Boyd v. United States (1886-1976), 76 Mich. L. Rev. 184 (1977); Ritchie, Compulsion that Violates the Fifth Amendment: The Burger Court’s Definition, 61 Minn. L. Rev. 383 (1977).
Hence the “speaking document” problem earlier mentioned did not arise. See Fisher v. United States, supra at 409, 414.
The Court first stated that the attorney could not assert the client’s (taxpayer’s) Fifth Amendment privilege; but as the client had passed the documents to the attorney in a privileged transaction, it was disposed to analyze the case as if the client had never made the transfer. See Fisher v. United States, supra at 396-405. (The Court analyzed two cases presenting essentially identical facts, one from the Third Circuit, the other from the Fifth Circuit.)
“The act of producing evidence in response to a subpoena nevertheless has communicative aspects of its own, wholly aside from the contents of the paper produced. Compliance with the subpoena tacitly concedes the existence of the papers demanded and their possession or control by the taxpayer. It also would indicate the taxpayer’s belief that the papers are those described in the subpoena.” Fisher v. United States, supra at 410.
See, e.g.,
United States
v.
Osborn,
We would see no distinction of constitutional dimension between production of what might be called the corpus delicti and production of a thing which was a step or two distant but was nevertheless incriminating. Cf.
Murphy
v.
Commonwealth,
Our analysis is consistent with
Williams
v.
Florida,
[We also note that if Hughes failed to produce the gun on request, he might be criminally liable under G. L. c. 269, § 10 (h).
