Sosman, J.
The Commonwealth has petitioned pursuant to G. L. c. 211, § 3, asking this court to set aside “partial verdicts” taken after a deliberating jury twice reported that they were deadlocked. A single justice of this court reserved and reported the case to the full bench. While we agree with the Commonwealth that the judge erred in taking “partial verdicts” on lesser included offenses within a single indictment, principles of double jeopardy preclude retrial of the defendant on the offenses as to which the jury rendered verdicts of not guilty. Although the judge should not have asked for or taken them, those verdicts will stand. The Commonwealth may retry the defendant only on the remaining lesser included offenses on which the jury were unable to reach a verdict.
[778]*7781. Facts and procedural history. The defendant was charged in two indictments, one for vehicular homicide (G. L. c. 90, § 24G [a]) and the other for operating while under the influence of liquor causing serious bodily injury (G. L. c. 90, § 24L [1]), stemming from a two-car collision on Interstate Route 95. The defendant’s vehicle, a Dodge Durango, struck the victims’ vehicle, a Ford Bronco. Both victims were ejected from the Bronco. One victim died; the other sustained serious injuries. At trial, the jury heard conflicting testimony and sharply divergent expert opinions as to how the accident occurred. The Commonwealth contended that the defendant, traveling in excess of eighty miles an hour, wove between lanes and struck the Bronco. The defendant contended that he had been traveling in one lane and under the speed limit, that the Bronco had angled across his lane, and that he had swerved his vehicle in an unsuccessful attempt to avoid the collision. There was also conflicting testimony from various witnesses at the scene, and later at the hospital, expressing sharply divergent views as to whether the defendant was intoxicated.
Trial commenced on November 14, 2000. The judge gave his final instructions on November 27, including instructions on a lesser included offense for each indictment.1 After two days of deliberation, a note from the foreperson reported that the jury were deadlocked. Deliberations were suspended, and the jury were told to report back the following morning. After consulting with counsel, the judge concluded that his instructions on the lesser included offenses had been erroneous, and that the evidence permitted the jury to consider additional lesser included offenses.2 Thus, when the jury returned on the morning of November 29, the judge delivered new, complete instructions [779]*779including those additional lesser included offenses and gave the jury revised verdict slips reflecting that wider array of offenses.3 As to the indictment charging motor vehicle homicide, the jury were given the following lesser included offenses for their consideration: (1) motor vehicle homicide operating recklessly or negligently so as to endanger (but not while under the influence of liquor); (2) motor vehicle homicide operating under the influence of liquor (but not operating recklessly or negligently); (3) operating under the influence of liquor; and (4) operating recklessly or negligently. As to the indictment charging operating while under the influence of liquor causing serious bodily injury, the list of lesser included offenses consisted of the following: (1) operating while under the influence of liquor (but not operating recklessly or negligently) causing serious bodily injury; (2) operating while under the influence of liquor; and (3) operating recklessly or negligently. See note 2, supra. The revised verdict slips provided separate boxes for “Guilty” corresponding to the offense as charged and each of the lesser included offenses, with a single box designated “Not Guilty” to be checked if the jury found the defendant not guilty of any offense.
At the end of that day of further deliberation, the jury again [780]*780reported that they were deadlocked. The next morning, November 30, the judge gave the jury the so-called TueyRodriquez instruction, see Commonwealth v. Rodriquez, 364 Mass. 87, 101-102 (1973) (Appendix A), and they resumed deliberations.4 5After several hours of further deliberation, the foreperson sent the judge the following note: “We have tried our hardest and cannot come to a unanimous decision. After viewing and reviewing all evidence and testimony, we cannot agree.” The judge then consulted with counsel concerning the declaration of a mistrial. Defense counsel requested that the judge inquire as to whether the jury had reached any “partial verdicts.” The Commonwealth requested that the judge simply declare a mistrial. The judge decided that he would inquire of the jury as to any “partial verdicts.”
The inquiry as to “partial verdicts” began with the judge’s explaining to the jury that he did not want to inquire into, or be told anything about, “what it is that you have discussed or the nature of your deliberations.” Next, he explained that, if the foreperson did not understand any of his questions, she should simply respond that she did not understand. The judge then inquired as to whether the jury had reached a unanimous verdict with respect to the motor vehicle homicide offense as charged. After an extended explanation by the judge as to what was meant by that inquiry, interspersed with repeated questions and expressions of confusion by the foreperson, the foreperson responded that the jury had reached a unanimous verdict on that offense.5 The judge then proceeded to make a similar inquiry [781]*781with respect to the offense as charged in the second indictment, asking the foreperson whether the jury had agreed on a verdict as to that charge. The foreperson replied that they had [782]*782also reached a verdict as to that charge. The judge then instructed:
“All right. Now, what I’m going to do, Ladies and Gentlemen, is I’m going to direct you to return to the jury room and to record — if indeed it is your unanimous verdict, if all twelve of you, as to those two charges, are in agreement on a verdict of guilty or not guilty — I’m going to direct you to record that verdict and then to return that paper to the Court and then I will, perhaps, inquire further of you.”
At that juncture, the prosecutor asked to be heard at sidebar. She objected to the procedure, arguing that “it seemed very confusing,” expressing doubt whether the foreperson had understood the question, and observing that “all of the jurors had looks on their faces, like they didn’t know what she was talking about when she said yes.” The prosecutor also expressed concern that the process, and the phrasing of the question, improperly pressured the jury to make a decision. The judge disagreed with that assessment, but proceeded to rephrase his question to the jury:
“Let me just say again, two things: the question that I have asked is whether all twelve of you have reached an agreement with regard to the offense charged in each indictment that’s comprised of five elements. And you have the written instructions to consult, if you go back and you want to consult them. If you have reached a unanimous decision that the Commonwealth has proved the guilt of the defendant on each indictment beyond a reasonable doubt or that it has not, that is, that you agree on a verdict of guilty or not guilty, I am directing you to go back and to record that verdict on each of the verdict slips by checking whether or not the verdict on that charge is guilty, if [783]*783the Commonwealth has proved all those five elements beyond a reasonable doubt; and if you have unanimously agreed that the Commonwealth has not proved those five elements beyond a reasonable doubt, then you should not check that box. And that’s what I’m asking each of you to do.
“So if your verdict is that the Commonwealth has proved those five elements beyond a reasonable doubt and, in accordance with the instructions I’ve given you, that box should be checked and it should be signed and dated by the foreperson on each indictment.
“If your decision, unanimously, is that the Commonwealth has not proved those five elements beyond a reasonable doubt, then you should come back with that box not checked. And that’s all I’m asking you to do.
“If you go back to the jury room and you’re not clear on what it is I’m asking you to do, then the procedure is, you write a note with the question and I’ll try to answer it.”
The jury then returned to the deliberation room.
In the jury’s absence, the judge then noted that, “until I gave the jury that last instruction, I’m not sure whether it would have been clear to the jurors what they were supposed to do with that verdict slip in the event that all twelve of them believe that the Commonwealth had not proved, beyond a reasonable doubt, the guilt of the defendant because the potential confusion was, if they checked not guilty, it could be inconsistent with the potential for a unanimous guilty of one of the lesser included offenses.” The prosecutor protested that the instruction was still confusing, and that the jurors had looked confused. She pointed out that the format of the verdict slip, which had not been designed to take any such partial verdicts, added to that confusion.6 The judge explained that if the jury returned with the verdict slip blank, he would interpret that blank as a [784]*784unanimous vote of not guilty for the offense as charged, and that he would then inquire of the jury to confirm that that was their vote.
The jury returned,7 and the judge asked the foreperson whether the jury had reached “a unanimous verdict of guilty or not guilty” as to the two offenses as charged. The foreperson replied that they had. The judge and counsel then inspected the verdict slips, both of which were blank. At sidebar, the judge reiterated his interpretation that that meant a verdict of not guilty on the offenses as charged. The Commonwealth asked that the jury be polled. The clerk then began inquiring of the foreperson, as to the indictment for motor vehicle homicide, “is the defendant guilty or not guilty?” Before the foreperson answered, the judge interrupted and explained:
“Let me say again, by way of explanation, you are being asked, Ladies and Gentlemen, to indicate individually whether it is your decision as to just that one charge, which includes all five elements as I’ve explained them to you, whether it is your decision that the defendant is guilty or not guilty. And each of you will be asked that question to insure that, indeed, I correctly understand what the verdict of the jury is.”
The clerk proceeded to poll the jury. Each individual juror responded that the defendant was “not guilty” of the offense of motor vehicle homicide as charged. The prosecutor expressly waived polling as to the offense as charged in the second indictment.
The judge then made inquiry of the foreperson as to the lesser included offense of motor vehicle homicide while operating while under the influence of alcohol (but not recklessly or negligently so as to endanger), asking whether the jury had reached a unanimous verdict of guilty or not guilty as to that offense. The foreperson responded that they had. Then, the same inquiry was made with respect to the first lesser included offense on the second indictment, operating while under the influence of liquor (but not recklessly or negligently so as to endanger) causing serious bodily injury, and the foreperson [785]*785again responded that the jury had reached a unanimous verdict as to that lesser included offense. The judge instructed the jury to retire, and to mark the box for “Guilty” on the verdict slip if that was their verdict on that lesser included offense, and to leave the slip blank if their verdict was not guilty of that lesser included offense. After the jury retired, the prosecutor again noted her objection “to this process.” She reiterated her concern that jurors appeared confused, and pointed out that nothing in the judge’s instructions told the jurors that they could report back that they had not reached a verdict either way.
The jury returned; the verdict slips were again inspected and found to be blank; and the jury were again polled on the lesser included offense of motor vehicle homicide while operating under the influence of liquor. Each juror responded, “Not guilty.” The Commonwealth again waived polling as to the corresponding lesser included offense on the second indictment.
The judge then made inquiry of the foreperson as to the next lesser included offense of motor vehicle homicide operating recklessly or negligently so as to endanger (but not while under the influence of alcohol), asking whether the jury had reached a unanimous verdict of guilty or not guilty as to that offense. The foreperson replied that the jury had not reached a unanimous verdict as to that lesser included offense. No further inquiry was made, and the jury were discharged.
The judge ordered that the verdicts of not guilty be entered as to the offenses as charged and the first lesser included offense on each indictment, and declared a mistrial as to the remaining lesser included offenses. On December 1, the Commonwealth filed a motion to stay entry of the verdicts.8 On December 10, the Commonwealth filed a motion to vacate the entry of partial verdicts and to declare a mistrial as to all charges on both indictments. On January 4, 2001, the judge issued his memorandum of decision and order denying the Commonwealth’s motion. In that memorandum, the judge explained that, because of “the high level of preparation exhibited by both the prosecu[786]*786tor and defense counsel, the thoroughness with which they had presented the evidence and cross-examined the witnesses, and the careful attention which the jury appeared to have paid to the evidence and the court’s instructions, the public interest in the resolution of any charges as to which the jury had found the facts and reached unanimous agreement, [and] the defendant’s interest in not facing trial a second time on any charges as to which the jury had agreed on a unanimous verdict of not guilty, [he had] decided that if this jury had reached partial verdicts they should be received and recorded.” Although articulating the view that principles of double jeopardy required him to make inquiry as to any partial verdicts, the judge ultimately based his decision on the theory that the taking of partial verdicts on lesser included offenses was authorized by Mass. R. Crim. P. 27 (b), 378 Mass. 897 (1979), and that he had validly exercised his discretion under that rule.
2. Discussion. The Commonwealth contends that the judge erred in attempting to take partial verdicts, that the verdicts themselves were not returned and recorded in accordance with the formal requirements for verdicts, and that the partial verdicts should therefore be vacated, allowing the Commonwealth to retry the defendant on the offenses as charged in both indictments, along with all lesser included offenses. We consider first whether the taking of partial verdicts on a single charge, broken down into lesser included offenses, is a permissible practice. For the following reasons, we conclude that it is not.
a. Rule 27 (b). The judge’s decision was premised on his belief that rule 27 (b) permits the taking of partial verdicts on lesser included offenses. We begin first with Mass. R. Crim. P. 27 (a), 378 Mass. 897 (1979), which provides the fundamental requirements for a verdict in a criminal case: “The verdict shall be unanimous. It shall be a general verdict returned by the jury to the judge in open court. The jury shall file a verdict slip with the clerk upon the return of the verdict.” Rule 27 (b), entitled “Several Offenses or Defendants,” then provides: “If there are two or more offenses or defendants tried together, the jury may, with the consent of the judge at any time during its deliberations return or be required by the judge to return a verdict or verdicts with respect to the defendants or charges as to which a [787]*787verdict has been reached; and thereafter the jury may in the discretion of the judge resume deliberation. The judge may declare a mistrial as to any charges upon which the jury cannot agree upon a verdict; provided, however, that the judge may first require the jury to return verdicts on those charges upon which the jury can agree and direct that such verdicts be received and recorded.”
As worded, rule 27 (b) pertains to cases involving multiple defendants or multiple separate indictments or complaints that are “tried together.” A lesser included offense contained within a single complaint, or within a single count of an indictment, is not a separate charge or a separate offense, nor would we refer to it as being “tried together” with the offense as charged. A defendant is tried on the offense as charged and, if the evidence warrants, the jury are given the option to convict the defendant of a lesser included offense that is contained within the offense as charged. A lesser included offense is part of a single charge, not a separate “charge” or separate “offense.” A trial on a single complaint or indictment is not a trial on “two or more offenses,” and the identification of applicable lesser included offenses at the time the case is submitted to the jury does not transform the trial into a trial on “two or more offenses.”
That the term “two or more offenses . . . tried together” does not pertain to lesser included offenses contained within a single complaint or indictment is confirmed by reference to the requirements for “return” of a verdict under rule 27 (a). Where the jury have reached verdicts on some but not all “charges,” rule 27 (b) provides that the judge may require the jury “to return a verdict or verdicts with respect to the defendants or charges as to which a verdict has been reached.” A “return,” however, requires a “general verdict.” Mass. R. Crim. P. 27 (a). The term “general verdict” refers to “a verdict dispositive of the entire charge,” not just a portion of the charge. A Juvenile v. Commonwealth, 392 Mass. 52, 55 (1984) (A Juvenile). Rule 27 (a) also requires that the jury “file a verdict slip with the clerk upon the return of the verdict.” Under our practice, a single verdict slip accompanies the indictment or complaint, not a separate verdict slip for each lesser included offense. Rule 27 (b) contemplates the “return” of verdicts on some “charges,” [788]*788followed by the resumption of deliberations with respect to the remaining “charges.” The jury cannot, however,. “file a verdict slip” with the clerk and then resume deliberations on remaining lesser included offenses that are reflected on that same verdict slip.
Thus, rule 27 (b) permits taking verdicts on less than all of the charges set forth in separate complaints, or separate indictments, or less than all of the charges against multiple defendants tried together. See, e.g., Commonwealth v. Foster, 411 Mass. 762, 762-763 & n.1 (1992) (jury returned verdicts of guilty on indictment charging assault with intent to commit rape of child and on one count of indictment charging violation of protective order prior to resuming deliberations resulting in acquittal on indictment charging rape of child and second count of violation of protective order; judge did not err in requiring jury to return verdicts separately, as such partial verdicts are permitted by rule 27 [b]); Commonwealth v. LaFontaine, 32 Mass. App. Ct. 529, 534-535 (1992) (separate verdicts taken on three of ten indictments against two defendants). See also Commonwealth v. Floyd P., 415 Mass. 826, 830 (1993) (under rule 27 [b], judge could take verdicts on delinquency complaints charging armed robbery and aggravated rape and send jury back to deliberate on another complaint charging murder, but error to take verdicts when jurors had reached only “conditional or tentative agreement”).
However, rule 27 (b) does not permit the taking of a verdict on anything less than the entirety of a single complaint or indictment, as that would not qualify as the “general verdict” required by rule 27 (a). See A Juvenile, supra. Indeed, A Juvenile, supra at 55 n.1, distinguished this very point: “Where a complaint or indictment, in multiple counts, charges multiple crimes (e.g., two separate murders; two separate armed robberies) a general verdict could be returned as to one of the counts, despite deadlock on the other counts.” The court distinguished the situation presented by a single complaint containing lesser included offenses (in that case, “a complaint charging a single murder” but containing the lesser included offense of manslaughter). Id. This court announced its agreement with those jurisdictions that had “rejected the partial verdict” for lesser included offenses, [789]*789on the grounds that the taking of such partial verdicts “would constitute an unwarranted and unwise intrusion into the province of the jury” and that such partial verdicts might represent only “a temporary compromise in an effort to reach unanimity,” not a truly final verdict. Id. at 56, quoting People v. Hickey, 103 Mich. App. 350, 353 (1981).9 As such, the judge’s reliance on rule 27 (b) as authority for the taking of partial verdicts in this case is at odds with the wording of the rule and this court’s decision in A Juvenile, supra.
b. Implications for double jeopardy. In an apparent attempt to overrule A Juvenile, supra, and labeling it “a bad opinion,” the defendant argues that, to avoid double jeopardy, the jury must be given an opportunity to return a partial verdict whenever they are deadlocked on a complaint or indictment that contains lesser included offenses. Otherwise, the argument goes, one cannot tell whether there was a manifest necessity for a retrial on the offense as charged, or on any offense higher than the lowest of the lesser included offenses. He argues that if the jury [790]*790have unanimously concluded that the Commonwealth has failed to meet its burden on one or more of the elements of the offense as charged, and have deadlocked only as to some aspect of a lesser included offense, he should have the benefit of that “acquittal” and should not have to endure being retried. That it would be desirable, for many reasons, to extract such information from a deadlocked jury (assuming that the jury have reached any such final conclusion as to the offense charged) does not solve the significant problems encountered in attempting to do so. As stated in A Juvenile, supra at 56, a judge’s inquiry concerning possible partial verdicts improperly intrudes on the jury’s function, and we remain of the view that the ostensible benefits to be gained by such a procedure are outweighed by its risks.
In assessing the merits of adopting some procedure by which deadlocked juries could be asked to render partial verdicts on lesser included offenses, we first note that, consistent with the prohibition on double jeopardy, the adoption of any such procedure would effectively require judges to inquire as to partial verdicts in all cases of deadlock. In other words, if a judge may request such a partial verdict but fails to do so, there is no “manifest necessity” for retrial on the offense as charged. Jurisdictions that permit such partial verdicts to be taken ultimately conclude that failure to do so bars retrial on anything other than the lowest of the lesser included offense contained within the complaint or indictment.10 See State v. Tate, 256 Conn. 262, 287, 288 (2001) (where judge denied defendant’s [791]*791request to take partial verdict on murder charge, court “failed to explore all reasonable alternatives to declaring a mistrial” and there was no “manifest necessity” for declaring mistrial; defendant could only be retried on lowest lesser included offense of criminally negligent homicide). See also Whiteaker v. State, 808 P.2d 270, 277-279 (Alaska Ct. App. 1991); Stone v. Superior Court, 31 Cal. 3d 503, 517-520 (1982); State v. Pugliese, 120 N.H. 728, 730 (1980); State v. Castrillo, 90 N.M. 608, 613-614 (1977). Thus, in deciding whether to allow such partial verdicts, we can decide only between prohibiting them in all cases or requiring them in all cases. There is no “middle ground” of simply giving the trial judge discretion to take a partial verdict. Thus, one cannot point only to the merits of taking such verdicts in cases where the jury have conclusively decided that the defendant is not guilty of the offense as charged, but must consider the risks inherent in making such an inquiry in all cases, including those where there has not in fact been any such conclusive determination as of the time deadlock is reported.
The concerns surrounding partial verdicts that we articulated in A Juvenile, supra, remain valid. This case, with its illustration of the confusion inherent in attempting to take such verdicts, confirms our decision to adhere to the position announced in A Juvenile, supra. There, we first referenced the impropriety of “intrusion into the province of the jury.” Id. at 56, quoting People v. Hickey, 103 Mich. App. 350, 353 (1981). Inquiry concerning partial verdicts on lesser included offenses, no matter how carefully phrased and delivered, carries a significant potential for coercion. We have previously recognized that deadlocked juries are particularly susceptible to coercion. See Commonwealth v. Connor, 392 Mass. 838, 844 (1984) (“general principle [that utmost caution is required to avoid invading province of jury] has been stressed in cases dealing with the wording of supplementary instructions to a deadlocked jury”); Commonwealth v. Rodriquez, 364 Mass. 87, 99 (1973) (misstatement in standard Tuey charge needed to be corrected “even if it is a slight one” due to “a tendency toward coercion”). The statutory prohibition on requiring jurors to [792]*792continue deliberations after their second report of deadlock, G. L. c. 234, § 34, also recognizes the coercive effect of continued deliberations in these circumstances. Where the jurors have twice reported themselves deadlocked, and have already heard the Tuey-Rodriquez charge, a judge’s inquiry concerning partial verdicts cannot avoid communicating to the jury the judge’s desire to salvage something from the trial. However the inquiry is articulated or explained, the import of the inquiry is unmistakable: “Can’t you at least decide a part of this case?” The inquiry, by its nature, plays on the deadlocked jurors’ natural sense of frustration, disappointment, and failure. The jurors are confronted with the request, and asked to absorb its inherent complexity, at the worst possible time, when they are tired, anxious to be discharged, and perhaps angry at fellow jurors whom they blame for failing to reach agreement. While technically inquiring only as to what the jurors have already agreed on, the request for partial verdicts broken down by lesser included offenses implicitly suggests that the jurors should try just a little bit harder to come back with at least a partial decision to show for all of their efforts. And, by definition, any further discussion amongst the jurors regarding their response to the judge’s partial verdict inquiry would itself be further deliberation, in violation of G. L. c. 234, § 34.11
Indeed, as was done here, each time the jury were sent back to record their unanimous vote, starting with the offenses as charged, the judge gave the jurors the option of reporting back that the defendant was guilty — i.e., he gave them the option of reaching an entire verdict, notwithstanding their twice having reported a deadlock. If, as to any level of offense, the jury had returned with a verdict of guilty, there is no question that this defendant would be making a strenuous — and potentially meritorious — argument that that guilty verdict was the product of coercive intrusion into the function of the jury. For all the reasons that we would lack confidence in any verdict of guilty that was returned under such conditions, we should lack [793]*793confidence in any verdict of not guilty. There is simply too great a risk that such a verdict would merely be the product of one hasty, final attempt to satisfy the judge’s apparent desire for some form of decision on the case.
In A Juvenile, supra at 56, we also recognized that, until there is a final verdict on the entire charge, one cannot be certain whether jurors have been proffering “compromise” votes in an attempt to reach a verdict.12 The most recent “vote” immediately prior to reporting deadlock may well be tentative, a failed experiment in compromise, and not a true expression of each juror’s assessment of the case. See People v. Hickey, 103 Mich. App. 350, 353 (1981) (“it must be recognized as a practical matter that jury votes on included offenses may be the result of a temporary compromise in an effort to reach unanimity”). See also People v. Hall, 25 Ill. App. 3d 992, 994 (1975). After the jury have reported that deadlock, a judge’s request that the jury divulge the substance of their “final” vote may force the jury to report as “final” some votes that were not intended to be “final” unless they resolved the entire case.13
A request that the jury report such “partial verdicts” also presupposes that the jury’s deadlock has centered on some distinction between the levels of offenses. However, one cannot assume, from the mere report of deadlock, that there is any [794]*794“final” verdict lurking within that deadlock that may be extracted. In many instances, asking a deadlocked jury about partial verdicts would constitute attempting to extract from the jury something that does not exist. Deadlock may occur over threshold issues (e.g., identification) with little or no deliberation concerning the specific elements that would differentiate between the offense as charged and the lesser included offenses. Even if the deadlock does pertain to some distinction between the various levels of an offense, a judge has no way of knowing whether the jury have in fact fully considered the offense as charged. A jury may logically start their discussion with a consideration of the lowest lesser included offense, as, by definition, the lesser included offenses comprise the “building blocks” of the elements that lead up to the offense as charged. Deadlock may occur somewhere in that process before the jurors have even considered the additional elements that comprise the offense as charged. Asking a jury to report where they stand on the offense as charged invites a report that may be based on only preliminary, tentative deliberation (if any) on that level of offense, or hasty resumption of deliberations concerning that level of offense in an effort to satisfy the judge’s apparent desire for a decision. Such inquiries of the jury may succeed in extracting a partial verdict, but we could not have confidence that that partial verdict was the product of a thoughtful and thorough deliberation process.14
We thus conclude that judges should not initiate any inquiry [795]*795into partial verdicts premised on lesser included offenses within a single complaint or count of an indictment. In our view, the risks of juror coercion are too high, and the reliability of any such partial verdict returned is too low, to warrant such an approach to salvaging some partial result from a deadlocked jury. We remain of the view that such inquiries “constitute an unwarranted and unwise intrusion into the province of the jury.” A Juvenile, supra at 56, quoting People v. Hickey, 103 Mich. App. 350, 353 (1981).
c. Remedy. To remedy this error, the Commonwealth asks that we set aside the verdicts entered in this case so that it may retry the defendant on the offenses as charged. However, principles of double jeopardy preclude such a retrial. While the judge’s inquiry to the jury was in error, the jury did return verdicts of not guilty on certain offenses. As with any other form of error that results in acquittal, the defendant may not be retried on an offense as to which he was acquitted. See Sanabria v. United States, 437 U.S. 54, 64 (1978); Commonwealth v. Lowder, 432 Mass. 92, 105 (2000). The defendant here may only be retried on the remaining lesser included offenses on which no verdict was reached.
The Commonwealth argues that the normal procedures for the return and recording of verdicts were not followed and that we therefore may set aside the verdicts of not guilty. Specifically, the Commonwealth complains that the verdict slips were not filled out or signed, that the foreperson did not announce the verdicts, and that the clerk did not record them with the customary colloquy. The argument is unavailing. While the Commonwealth objected at various points and on various grounds to the judge’s decision to take partial verdicts, the Commonwealth did not object to the absence of the specific formalities that it now raises. Such technical defects, if raised [796]*796before the jury are discharged, are readily cured, and failure to make a timely objection waives the issue. See Commonwealth v. Fowler, 431 Mass. 30, 36 (2000). Moreover, while the taking of these verdicts was unorthodox in the extreme, the purposes of the customary procedures for taking verdicts were adequately satisfied when the jurors were polled.15 “The verdict is the formal decision of the jury, empaneled and sworn to try the case, as reported to the court. ‘The verdict which determines the rights of the parties, and is admitted of record, and upon which judgment is rendered, is the verdict received from the lips of the foreman in open court.’ ” Commonwealth v. Martell, 407 Mass. 288, 292 (1990), quoting Commonwealth v. Tobin, 125 Mass. 203, 206 (1878). Here, the foreperson and each of the jurors in turn announced verdicts of not guilty as to the specific offenses. The poll provided adequate evidence of “the free and unanimous assent of the jury to the verdict,” which is the purpose of the various customs and rituals that surround the taking of a verdict. Commonwealth v. Fowler, supra at 35, quoting Rich v. Finley, 325 Mass. 99, 106 (1949). See Commonwealth v. Lawson, 425 Mass. 528, 531-532 (1997). It would elevate form over substance to conclude that the jury did not return the verdicts that were subsequently entered, and the technical defects now raised by the Commonwealth do not provide a basis for setting those verdicts aside.
3. Conclusion. The matter is remanded to the county court for the entry of an order denying the Commonwealth’s petition.
So ordered.