as follows: I agree with the majority that the court properly denied appellant’s motion to suppress the imita*488tion pistol, although I do not agree that it is a “close” question. The police had, at the very least, the requisite reasonable suspicion to support a stop and frisk of appellant. The officers received a radio message that reported several males with a firearm and provided a description of one of the suspects. Upon arriving at the specified location moments later, they saw three young men running, one of whom fit the description transmitted to them by the police dispatcher. Pursuant to the common-law right of inquiry, the police properly directed the group, which included appellant, to stop. At that moment, bystanders in the area excitedly pointed at the youths, exclaimed, “That’s them!” and told the police the youths had been passing around a handgun and pointing it at other people. At this point, the information possessed by the police was far beyond an uncorroborated anonymous tip (see People v Herold, 282 AD2d 1, 6-7 [2001], lv denied 97 NY2d 682 [2001]; compare Florida v J.L., 529 US 266 [2000]), and it warranted a frisk for weapons. The police observed the excited demeanor of the bystanders (see People v Govantes, 297 AD2d 551, 552 [2002], lv denied 99 NY2d 558 [2002]), who were clearly reporting what they had just observed (see People v Johnson, 46 AD3d 415, 416 [2007], lv denied 10 NY3d 812 [2008]).
Moreover, appellant was not deprived of the effective assistance of counsel or of due process by his counsel’s failure to seek to reopen the suppression hearing, or the court’s failure to do so sua sponte, based on evidence elicited at the fact-finding hearing. The allegedly inconsistent evidence could not have affected the suppression ruling (see People v Clark, 88 NY2d 552, 555-556 [1996]; People v Logan, 58 AD3d 439, 440 [2009], lv denied 12 NY3d 926 [2009]).
The majority would reverse the Family Court’s decision on the facts and in the exercise of discretion, vacate the finding of juvenile delinquency and placement on probation and remand the matter with the direction to order an adjournment in contemplation of dismissal (ACD) pursuant to Family Court Act § 315.3 (1). On the basis of the record before this Court, I cannot agree.
Initially, despite the majority’s argument to the contrary, there is no question that the underlying case was proven beyond a reasonable doubt. The Family Court, which had appellant before it, conducted a suppression hearing and a fact-finding hearing. It had a full opportunity to weigh all the evidence and the credibility of the witnesses. The evidence unequivocally revealed that a group of individuals, one of whom was appellant, were passing between each other what clearly *489appeared to be a handgun. Additionally, witnesses at the scene pointed out these individuals and advised the police that they were pointing the gun at persons outside a school building. All of this occurred in an area where a number of schools were located, and was seen by students, parents and teachers during dismissal time when a significant number of people were on the street. This was not an “act of thoughtlessness” while appellant was “fooling around with some friends,” which might, under other circumstances, justify an ACD (cf. Matter of Israel M., 57 AD3d 274, 276 [2008]; Matter of Justin Charles H., 9 AD3d 316, 317 [2004]). These actions created the potential for injury to both bystanders and police and the disposition was appropriate (see Matter of Alrick J., 58 AD3d 457 [2009] [possession of a gravity knife in a public park was a serious matter and Family Court appropriately imposed a conditional discharge]). The majority’s criticism of the testimony and the trial court’s findings based on that testimony is, on this record, unwarranted. While there was some inconsistent testimony by the police witnesses, the court, which had the full opportunity to observe all the witnesses, credited their testimony. Additionally, the fact that it discredited some of the civilian witnesses’ testimony cannot be characterized as “arbitrary.” It has long been held that the credibility of the presentment agency’s witnesses is primarily an issue to be determined by the trier of fact, who saw and heard the witnesses (see People v Hill, 176 AD2d 755, 755 [1991], lv denied 79 NY2d 858 [1992]). Its determination should be accorded great weight on appeal and should not be disturbed unless clearly unsupported by the record (see People v Garafolo, 44 AD2d 86, 88 [1974]).
Here, the fact-finding determination was based on legally sufficient evidence and was not against the weight of the evidence. There is no basis for disturbing the court’s determinations regarding credibility, and the inconsistencies in the witnesses’ testimony do not warrant a different conclusion (Matter of Jasmine H., 44 AD3d 303, 304 [2007]).
Moreover, it should be noted that appellant did not ask the Family Court to grant an ACD, and thus, this issue was not preserved for our review (see Matter of Derrick H., 80 AD3d 468, 469 [2011]). Although not dispositive, such a request would have put the issue before both the Family Court and this Court for a full examination of its merits. Nevertheless, the facts of this case do not lend themselves to the disposition suggested by the majority. Indeed, in those cases where we have found an ACD to be “the least restrictive available alternative,” those appellants’ actions did not pose a threat to the community (see *490Israel M., 57 AD3d at 276; Matter of Joel J., 33 AD3d 344 [2006]). The same cannot be said in this case.
As a result, the Family Court acted within its discretion and I see no reason to disturb its findings or disposition.