The defendant, Vernon Jones, on a jury trial was convicted of two counts of selling *230 heroin in violation of § 19-480 (a) 1 of the General Statutes, and entered a plea of guilty to the second part of the original information charging him with the crime of being a second offender in violation of General Statutes § 54-118. A motion to set aside the verdict was denied by the trial court and from the judgment rendered thereon he has appealed, assigning error in the court’s failure to adopt a paragraph of his draft finding; in certain evidentiary rulings of the court; and in a portion of its charge to the jury.
The state offered evidence to prove and claimed to have proved the following facts: In January, 1970, Detective Francis DeGrand, a member of the New Haven police department who had been assigned to the gambling and narcotics division for the previous two years, was assigned to the intelligence division to work with Officer Hawley in an undercover operation at a variety store at 719 Congress Avenue. On January 19, 1970, DeGrand was secreted in .a Volkswagen bus, with one-way glass on all four sides, parked directly in front of and approximately ten feet away from the store, when he saw the defendant enter the store and engage Hawley in a short conversation. There were no other customers in the store when the defendant entered, although prior to his entrance DeGrand had witnessed approximately fifteen to twenty people go in and out of the store to make purchases of bread, soda or candy. He had seen the defendant three or four times prior to this date and knew what he looked like. After the conversation, the defendant handed a plastic bag to Hawley, who *231 then gave some money to the defendant. The accused left the store and thereafter Hawley threw the plastic hag into the bus where it was examined by DeGrand who ascertained that it contained four bundles of fifteen glassine bags for a total of sixty glassine bags. DeGrand returned to his office at police headquarters and performed a Marquis reagent test which indicated the presence of a narcotic substance in the white powder contained in the two bags tested. He then discarded the plastic bag, placing the contents in an envelope, the front of which identified the person arrested as Vernon Jones and its contents as “Sixty Glassine bags of white powder.” He clipped the envelope, dated it “January 20, 1970,” although the transaction had occurred on January 19, 1970, and locked it in the police department safe. Two of the sixty glassine bags had been expended in performing the Marquis reagent test. The next day, January 20, 1970, the envelope was personally removed by DeGrand from the safe and delivered to the state toxicological laboratory in Hartford where it was found to contain fifty-eight glassine bags.
On January 27, 1970, from inside the bus at the same location, DeGrand witnessed another transaction between the defendant and Hawley, which resulted in Hawley’s throwing three separate packages of fifteen glassine bags into the bus. On this occasion there were no other customers in the store when the defendant entered. DeGrand returned to his office and performed a Marquis reagent test on the contents of one of the bags which showed the presence of a narcotic substance. He placed the bags in an envelope, marked it as he had marked the other envelope, although he wrote the actual date of the transaction thereon, locked it in the police safe and, *232 a day or two later, delivered it to the state toxicological laboratory in Hartford. The tests performed at the laboratory revealed that the powder from the glassine bags in both envelopes contained heroin.
The defendant offered evidence and claimed to have proved that he was elsewhere on both occasions, and, specifically, that he was dressed differently on January 19, 1970, than was described by DeGrand. The defendant also attacked the probative value of the envelope, dated January 20, 1970, and its contents, all of which were admitted as state’s exhibit A, by offering proof that the following day’s date had been placed thereon; that the original plastic bag had been discarded; that the envelope had not been sealed; that it was not taken to the state toxicological laboratory until the next day; and that when opened it contained only fifty-eight glassine bags.
It is the defendant’s claim that the trial court in limiting the cross-examination of the identifying witness for the prosecution denied the accused his constitutionally-guaranteed right of confrontation in violation of the sixth and fourteenth amendments to the constitution of the United States and article first, § 8, of the constitution of Connecticut.
When the absolute right of cross-examination has been fully and fairly exercised, its extent becomes subject to the sound discretion of the trial court which may exercise a reasonable judgment in determining when the line of inquiry has been exhausted.
Fahey
v.
Clark,
Detective DeGrand testified on direct examination that he had seen the defendant three or four times prior to January 19, 1970, the date on which the information charges the first sale had taken place, and that he was familiar with the defendant. In the course of cross-examination, counsel for the defendant asked the officer concerning these three or four occasions: “Can you tell us approximately where, or when, or for how long?” No objection was taken to this question and DeGrand responded that he had been involved in prior narcotics investigations and arrests in which the accused also was involved. Upon further questioning by defense counsel, the officer answered that the defendant on trial had been neither a defendant nor an arrestee in those previous investigations or arrests. The defendant’s attorney then asked when those arrests had taken place, to which the state objected on the ground that “we are pretty far afield . . . .” When the court then questioned the relevancy of this line of inquiry, a *234 colloquy ensued in which counsel for the defendant stated that he wished to determine the precision of the officer’s identification. The court agreed that the number of times the officer had seen the defendant was relevant, commenting “[b]ut I don’t think the details of any other involvements would be helpful.” At that point, without requesting or receiving a specific ruling on the question objected to 2 or on whether DeGrand’s prior contacts with the defendant could be explored along the lines of the original question, to which no objection had been taken, the defendant asked for and was granted an exception.
Under the circumstances, the defendant has failed to meet his burden of establishing that an erroneous ruling has been made which was probably harmful to him.
State
v.
Mahmood,
We cannot conclude on this record that the trial court, by its comment and grant of an exception, abused its discretion in determining the relevance of cross-examination or denied the defendant an opportunity to exercise his constitutionally-guaranteed right of confrontation.
The defendant further claims that the court erred in sustaining the state’s objections to questions asked DeGrand concerning Hawley’s involvement in gambling activities and in restricting the direct testimony of the defendant about whether he “played numbers” with Hawley. The court did not abuse its discretion in twice sustaining objections to defense counsel’s questions of DeGrand whether bets were taken or numbers booked at the store since he had already answered on cross-examination that Hawley was not involved in gambling activities and evidence at no time was offered that such activities had occurred on the dates in question. See
State
v.
Mullings,
The defendant has assigned error in the court’s denial of Ms motion prior to testifying that three previous convictions—a 1955 conviction under the State Narcotic Drug Act, a 1961 theft and a 1967 conviction of, carrying a dangerous weapon—be held inadmissible;to impeach Ms credibility. In presenting Ms defense, on direct examination, the defendant admitted^ those prior convictions, presumably as a tactical procedure, and also was questioned concermng them on cross-examination. The trial court in its charge instructed the jury that the evidence was admissible only for the limited purpose of attacking the witness’ credibility.
Proof of prior convictions of crimes for wMch imprisonment may be more than one year may be used to impeach witnesses. General Statutes § 52-145;
State
v.
Hall,
The defendant also challenges a portion of the court’s charge in two respects, claiming in each instance that the accused was denied the presumption of innocence because the state was relieved of its burden of proving him guilty beyond a reasonable doubt. During the course of its instructions the court remarked: “[I]f you believe the testimony of Officer DeGrand rather than that of the accused, Mr. Jones, that is really the determining criteria for you to consider in reaching a decision in this case .... I think it practically boils down to the question of who you believe in the light of all the evidence.” This comment was not erroneous. The court carefully and repeatedly instructed the jury throughout its charge that the defendant was presumed innocent until the jury found him guilty of each element of the offenses beyond a reasonable doubt and, specifically, with regard to the conflicting testimony of DeGrand and the defendant, the court stated: “I want to make it clear to you that the burden which
*238
rests on the State to prove that the accused is guilty of the crimes charged beyond a reasonable doubt, necessarily involves proof that he was present at the scene . . . when the crime was committed.” The court further instructed the jury that the accused need not prove his claim of alibi and it also noted that the testimony of a police officer was not entitled to any special consideration. In a criminal case the trial court, in its discretion, may make fair comment on the evidence and particularly on the credibility of witnesses.
State
v.
Cari,
The other claimed error in the charge allegedly occurred when the court, as shown by the finding as corrected, instructed the jury that they need not give too much consideration to the clause in § 19-480a of the General Statutes which would exempt the defendant from the crime charged were he shown to be authorized by the state to sell or dispense narcotic drugs.
3
State
v.
Brown,
The defendant claims in the remaining assignments of error, as briefed by him, that the trial court erred in admiting in evidence the envelope dated January 20, 1970, as state’s exhibit A, which the state claims contained the glassine bags placed therein by DeGrand after he had completed the Marquis reagent test; and that the court erred in subsequently denying the defendant’s motion to strike the exhibit from evidence. The defendant predicates these assignments of error on the grounds that there is sufficient doubt as to the proof of the chain of custody of the heroin and the probative value of exhibit A so as to justify its exclusion because the envelope was not sealed; the date placed thereon, January 20, 1970, was not the date on which the transaction occurred, viz. January 19,1970; and the plastic bag, containing the glassine bags, which was originally given to Hawley by the defendant was not placed in the envelope, which was exhibit A.
“[T]he prosecution is not required or compelled to prove each and every circumstance in the chain of custody beyond a reasonable doubt; the reasonable doubt must be to the whole evidence and not to a particular fact in the ease.
United States
v.
Hall,
There is no error.
In this opinion the other judges concurred.
Notes
Section 19-480a (Public Acts 1971, No. 812, § l; as amended by Public Acts 1972, No. 278, § 25) was inadvertently typed in the substitute information. It is clear that the defendant was not misled and the mistake at most was harmless.
“Q. I see. About when did these arrests take place?”
With regard to the “except as authorized” clause, the court remarked, “£s]o that I don’t believe it’s necessary for you to give too much consideration to that.”
