After choosing a jury trial in the first instance and then waiving his right to a jury trial, Kenneth Adams was convicted in the Wareham District Court jury of six session of open and gross lewdness and lascivious behavior under G. L. c. 272, § 16. The Appeals Court granted a stay of execution of sentence pending appeal. We transferred the appeal to this court on our own motion. We now reverse the defendant’s conviction because we conclude that several inculpatory statements made by the defendant were admitted in evidence without a showing that the defendant was fully advised of his Miranda rights and that, consequently, a finding could not have been made that the defendant knowingly, intelligently, and voluntarily waived these rights.
There was evidence from which the following facts could be found. On May 27, 1980, at approximately 7:15 p.m., Frank Wisnewski was walking with his daughter on West Haven Drive in Brockton. A blue Dodge Dart automobile passed them travelling in the opposite direction. A few minutes later the same automobile passed by them travel-ling towards them, slowing down as it approached. During this time Wisnewski was able to see into the car, and he saw the defendant “playing with his penis.”
Wisnewski returned to his home and informed his neighbor State Police Corporal Galen Worcester of the incident. After speaking with Wisnewski, Corporal Worcester got into his police cruiser and drove in the direction the defendant had been travelling. Meanwhile, Wisnewski telephoned the Brockton police. After driving for approximately five minutes, Corporal Worcester came upon the defendant’s vehicle. Corporal Worcester sounded his police siren and within one-quarter to one-half of a mile, the defendant stopped his vehicle by the side of the road. Corporal Worcester alighted from his cruiser, approached the defendant’s automobile, and asked the defendant for his driver’s license and registration. Worcester noticed that the *267 defendant’s pants were unzipped and that several pillows were beside the defendant on the front seat. From his observations while following the defendant’s automobile, Worcester inferred that the defendant had been sitting on these pillows prior to being stopped.
The defendant asked Corporal Worcester the reason for the stop and Worcester responded that the defendant had been seen masturbating in Brockton. Almost immediately after stopping the defendant, Worcester was joined by Brockton police officers, John Butler and Dominic Persampierri, who were accompanied by Frank Wisnewski. Officer Butler placed the defendant under arrest, put him in the cruiser, and took him to the Brockton police station.
1. At the defendant’s trial Officer Butler testified as to the events immediately preceding and following the defendant’s arrest. Butler stated that on arriving at the scene he advised Adams “of his rights” and then arrested him. Butler testified at trial that while transporting Adams to the police station he had a conversation with Adams. The prosecutor asked Butler what he said to Adams. The defendant’s lawyer objected at this point. He argued that no proper foundation had been established for this testimony because Butler had neither testified as to the Miranda warnings he administered to Adams, nor to whether Adams had waived these rights prior to making any statement. The judge directed Butler to recite the rights he had given Adams. Butler testified that he informed the defendant that he had the right to remain silent, the right to stop the questioning at any time, the right to consult with an attorney whom the Commonwealth would provide for him if he could not afford to pay for one, and the right to make one telephone call. The officer testified that he advised the defendant of his rights from memory rather than using a Miranda card. On further questioning from the prosecutor the officer stated that these were all the rights he administered to the defendant.
Following this recitation, the prosecutor asked Butler what the defendant said to him. The defendant’s counsel *268 again objected arguing that the statements should not be admitted because the police officer’s testimony revealed that he had not told the defendant that any statement he made could be used against him. Additionally, the defense counsel argued that the Commonwealth had still not made a showing that the defendant had knowingly, intelligently, and voluntarily waived his rights prior to making these statements. The judge made no explicit finding that the defendant waived his rights nor that the defendant received all the required Miranda warnings. He did not hold a voir dire hearing on these issues. He permitted Butler to testify, however, as to his conversation with the defendant over the defense counsel’s objection. Butler stated that Adams admitted to him that he had his penis out at the time of the incident. Butler further testified that Adams said that he did not think there was anything wrong with such conduct and that he did it all the time.
The defendant now renews his argument that admission of his statements in evidence violated the dictates of
Miranda
v.
Arizona,
*269
In this case, the Commonwealth did not demonstrate that the defendant was fully advised of his rights. Officer Butler’s testimony did not show that he had advised the defendant that any statements he made could be used against him. The Commonwealth now argues that there is no absolute requirement that an officer must inform a defendant that his statements may be used against him. This is a clear misstatement of the law. In
Miranda
the Supreme Court held that: “The warning of the right to remain silent
must
be accompanied by the explanation that anything said can and will be used against the individual in court” (emphasis added).
Miranda, supra
at 469. This warning “is an absolute prerequisite to interrogation.”
Id.
at 471. The Court explained that: “This warning is needed in order to make [the accused] aware not only of the privilege, but also of the consequences of forgoing it. It is only through an awareness of these consequences that there can be any assurance of real understanding and intelligent exercise of the privilege.”
Id.
at 469. Our cases have recognized the mandatory nature of this warning. In
Commonwealth
v.
Dustin,
The Commonwealth also argues that the defendant is barred from challenging the admission of his statements because he failed to file a motion to suppress the statements. However, the Commonwealth has confused the motion to suppress with the admission of the statements in evidence. Even if the defendant has not moved to suppress his statements the burden is still on the Commonwealth, upon sea
*270
sonable objection, to prove affirmatively, prior to the admission of these statements, that the statements were properly obtained and that the defendant waived his rights. Id.
1
The Commonwealth offered no evidence on this issue. Since the record demonstrates that the defendant was not advised of all of the required Miranda warnings, the statements must be suppressed since no valid waiver could be obtained of rights that were not explained completely. The defendant, therefore, must be afforded a new trial. See
Commonwealth
v.
Tavares,
2. The defendant also appeals from the judge’s denial of his motion to dismiss the complaint charging him with “open and gross lewdness and lascivious behavior” under G. L. c. 272, § 16, on the ground that the statute is unconstitutionally vague. Several general principles govern our determination as to whether a challenged statute is unconstitutionally vague. Criminal statutes must be sufficiently specific so as to give fair notice as to what conduct is forbidden.
Rose
v.
Locke,
Here the defendant was arrested after a private citizen complained that he saw the defendant drive by slowly in his automobile on a public way with his penis exposed and masturbating. We believe that this conduct, if proved, would be included under the commonly understood meaning of “open and gross lewdness and lascivious behavior” so as to give the defendant fair warning that his conduct is proscribed.
Moreover, where a statute has been clarified by judicial explanation or by application to particular conduct the statute will withstand a challenge that it is unconstitutionally vague.
Rose
v.
Locke, supra
at 50-52.
Robinson
v.
Berman,
Additionally, in
Commonwealth
v.
Wardell,
These several cases which involved prosecutions under § 16 for conduct involving indecent exposure provided the defendant with adequate notice that his alleged conduct was prohibited under this statute. The act of masturbating in a public place certainly falls within the common understanding of “open and gross lewdness and lascivious behavior.” Accordingly, without considering other conduct not presented to us in this case, we conclude that the statute is not unconstitutionally vague as applied to this defendant.
Commonwealth
v.
Balthazar,
3. After both sides had argued the defendant’s motion to dismiss the complaint on the ground of unconstitutional vagueness, the defendant waived his right to a jury trial even though he had originally elected to have a jury trial in the first instance. When the motion to dismiss was denied, *273 the defendant moved for the judge to recuse himself from sitting at the jury-waived trial. No evidence was taken during the hearing on the motion to dismiss. The judge denied the motion and the defendant proceeded to trial without objection. The facts stated by counsel during argument on the motion to dismiss were largely uncontroverted. The defendant’s counsel based his motion for recusal on G. L. c. 218, § 27A, which regulates appeals to the jury-of-six sessions. 2 The defendant relies on that part of G. L. c. 218, § 27A (d), as amended by St. 1979, c. 344, § 3, which states, “No justice so sitting shall act in a case in which he has sat or held an inquest or otherwise taken part in any proceeding therein.” The defendant argues that since this judge had heard and decided the motion to dismiss, and thus taken part in a proceeding, the judge was required to recuse himself.
We disagree. The defendant’s argument falls on the basic principle of statutory construction that a statute must be read as a whole and consistently with the legislative intent. A “literal construction will not be adopted when that construction would be inconsistent with other material provisions of the statute and would defeat the aim and object of the legislation.”
Lexington
v.
Bedford,
Judgment reversed.
Finding set aside.
Notes
In most cases it is preferable for a defendant to file a pretrial motion to suppress evidence. See Mass. R. Crim. P. 13(c) (2),
Although the defendant originally chose a jury trial in the first instance under the provisions of G. L. c. 218, § 26A, inserted by St. 1978, c. 478, § 188, the relevant procedures are the same. Section 26A provides in pertinent part that: “[Tjrials by jury in the first instance shall be in those jury sessions designated by said section twenty-seven A for the hearing of such appeals. All provisions of law and rules of court relative to the hearing and trial of such appeals shall apply also to jury trials in the first instance."
