On a trial to a jury, the defendant was found guilty of two counts of injury or risk of injury to a minor child in violation of § 53-21 of the General Statutes. On appeal, four of the issues covered by the defendant’s preliminary statement are being pursued, namely: (1) whether the court erred in allowing the state to present evidence of other crimes allegedly committed by the defendant; (2) whether the court improperly limited the defendant in his cross-examination of the complaining witness; (3) whether the court erred in allowing the jury to hear tape recordings of conversations between the defendant and the complainant; and (4) whether the court erred in denying the defendant’s motion for a supplemental bill of particulars. In order adequately to consider these claimed errors, it is necessary to summarize only the following facts as to which the state produced. evidence as set forth in the statements of facts printed in the briefs.
The complaining witness, a minor under the age of sixteen years who shall be referred to simply as Janet, while attending the seventh and eighth grades at the John F. Kennedy Junior High School in Milford, had the defendant, Richard Hauck, as a science teacher. In November, 1971, while discussing her work and grades with her, the defendant *142 told Janet lie would give her a “C” in science if she would allow him to photograph her. As a result of this conversation, at various times during the school year ending in 1972, sometimes once or twice a week, the defendant took Janet into the science storage room at the school, locked the door, closed the blinds, instructed her to disrobe and photographed her. On one of these occasions, the defendant touched her private parts and on another occasion took her to a room in a motel and took nude or seminude pictures of her. At the end of the school year, Janet received a “C” in science and told the defendant that she would not pose for any more pictures. During the following school year, some of the pictures turned up at the school and the assistant principal showed some of them, which had come into her possession, to Janet’s mother. As a result, Janet related the foregoing story to her mother and, thereafter, to the Milford police.
Pursuant to a plan arranged by the police, Janet, •with a microphone concealed on her person, had a conversation with the defendant in the school parking lot during which they discussed the pictures. A portion of that conversation was recorded by the police on tapes which were later played during the trial to the jury. Many parts of the conversation reproduced on the tape recording tended to corroborate Janet’s story, as did portions of a telephone conversation between Janet and the defendant, recorded by the police and played to the jury. When the defendant was arrested during a meeting with Janet, also arranged by the police, a search of his car disclosed a Polaroid camera and some nude photographs, and a search of his home in Old Say-brook, made pursuant to a search warrant, turned up approximately fifty photographs of Janet posed *143 while partially unclothed in the science classroom of the defendant, together with several similar photographs taken in a motel room.
The first claim of error arises from the court’s permitting the state to present evidence of other crimes allegedly committed by the defendant with which he was not charged in this case but which the state claimed to show “a common scheme, design or innate peculiarity” in the crime under consideration. The evidence here under attack was testimony elicited from another girl under the age of sixteen years to the effect that during the same school year and the same period of time covered by the information the defendant had been her science teacher at the John F. Kennedy Junior High School in Milford; that during that period, the defendant, on at least five occasions, having requested her to come to his desk to look at some papers, had placed his leg between her legs and that on one such occasion he had placed his hand on her thigh; that at the end of her seventh-grade year he told her that if she stayed after school every day he would give her a passing grade as long as she consented to his touching her in that manner. Timely objection was made to the introduction of this testimony.
We
have had occasion recently to discuss at length the general rule that prior criminal misconduct may not be shown to prove the bad character of an accused or his tendency to commit criminal acts, together with the well-recognized exceptions to that rule, and to review the pertinent authorities. “This court has long recognized the danger of prejudice against the defendant which may result from the admission of such evidence.
State
v.
Gilligan,
*145
An examination of recent decisions in other jurisdictions indicates a greater liberality in admitting evidence of other criminal acts to show a common scheme, pattern or design in sex-related crimes. In
People
v.
Mendoza, 37
Cal. App. 3d 717,
While not previously called upon to decide the precise issue raised here, this court did indicate, in a case having many similarities to the one now before us, that it would consider the question of the introduction of other crimes evidence in a sex-related case if properly presented on appeal. In
State
v.
Manning,
Here, the state’s claim that there was a common scheme or design was based upon the fact that both crimes, the one before the court and the one not charged in the information, involved a teacher using his position of authority to obtain or to seek to obtain sex-related favors in return for a passing grade in his science course; that the acts in both instances took place during the lunch hour or after school in the defendant’s science classroom after a minor female student had come to the defendant for extra work to obtain a better grade; and that these incidents were occurring at frequent intervals
*147
during approximately the same period of time. As we stated in
State
v.
Marquez,
The next assignment of error pursued by the defendant is his claim that the court improperly limited his cross-examination of the complaining witness. During his lengthy cross-examination of Janet, defense counsel was permitted to make exhaustive inquiry into the basic facts of her testimony and as to her credibility as a witness. The only question disallowed hy the trial court was the one complained of here referring to a hoy named “Dewie” who had been mentioned during Janet’s testimony. Without laying any foundation as to time or place, counsel abruptly asked, “[a]nd did you have any sexual experiences with this boy?” The court sustained the state’s objection to this question and it was not answered. In attacking the
*148
court’s ruling on this appeal, the defendant makes the claim, for the first time, that the groundwork for the question had been set by the state’s questions of the witness concerning her religious background. The propriety of the state’s inquiries has not been questioned on appeal, and the only claim now urged by the defendant is that once the door had been opened by the state as to Janet’s religious background, he was entitled to inquire into possible sexual activities on her part. This claim was never made before the trial court during a prolonged argument by defense counsel, and the state correctly argues that the grounds for objection on appeal differ from those stated at the time of trial. “To assign error in the court’s evidential ruling on the basis of objections never raised at the trial amounts to trial by ambuscade of the trial judge. . . . This court is not bound to consider claims of law not made at the trial . . . and . . . the record discloses ... no prejudice to the defendant [that] can be claimed to constitute ‘exceptional circumstances’ as discussed in
State
v.
Evans,
It is difficult to understand the basis for the defendant’s claim that the court erred in permitting the jury to listen to tape recordings of a conversation between Janet and the defendant, which was monitored by the police. His basic contention appears to be that the recording was, in his own words, “fuzzy, inaudible, garbled and fragmentary, and not properly authenticated.” After Janet had testified as to her recollection of the conversation, the state conducted an extensive voir dire, in the absence of the jury, as to the authenticity and chain *149 of custody of the tapes. By agreement of the parties, the trial transcript of the recordings was prepared from only those portions which were audible and that transcript was made available to assist the jury after being entered into evidence. Not only did defense counsel not object to the jury’s use of the transcripts and their introduction into evidence but he even went so far as to state in open court, “I am satisfied that what was said on those tapes which could be recorded has been recorded; and possibly accurately.” At another point, he stated that he would have no objection to playing the tapes to the jury without the transcript.
The use of transcripts to supplement a tape recording as an aid to the jury is a widely accepted practice. See
United States
v.
Marrapese,
The final claim of error pursued by the defendant is in the denial of his motion for a supplemental bill of particulars. The record indicates that, in response to the court’s granting of the defendant’s motion for a bill of particulars addressed to the original short-form information, the state limited the starting point of the acts complained of to November 11, 1971, and alleged that they continued “on or about divers dates” between that time and June, 1972. This was in compliance with the court’s order that the state “comply in furnishing the exact date or dates to the best of its ability from November, 1971, through June, 1972.”
The offenses charged here were obviously of a continuing nature and it would have been virtually impossible to provide the many specific dates upon which the acts constituting the offenses occurred. The general rule is that where time is not of the essence or gist of the offense, the precise time at which it is charged to have been committed is not material. See 41 Am. Jur. 2d, Indictments and Informations, § 115, and authorities therein cited. In United States v. Wells, 180 F. Sup. 707 (D. Del.), the court interpreted Rule 7 (c) of the Federal Rules of Criminal Procedure, providing that an indictment shall be a plain, concise and definite written statement of the essential facts constituting the offense charged, as not requiring that it state the exact dates when such dates are not an essential element of the offense, which, in that case, was the knowing transportation of obscene film in interstate *151 commerce. Section 514 of the Connecticut Practice Book states: “The allegation in an . . . informa,tion that the accused committed the offense shall in all cases be considered an allegation that the offense was committed after it became and while it was an offense and before the . . . filing of the information.”
The reluctance of the court to force the state to furnish the exact dates of the many continuing acts of the defendant during the approximately seven-month period covered by the information and which were claimed, in toto, to have constituted “injury or risk of injury to a minor child” was shown to be clearly reasonable by the testimony at the trial. A motion for a bill of particulars is addressed to the sound discretion of the trial court.
United States
v.
Gray,
There is no error.
In this opinion the other judges concurred.
