Ordered that the order of disposition is affirmed, without costs or disbursements.
Viewing the evidence in the light most favorable to the presentment agency ( see Matter of David H., 69 NY2d 792, 793; Matter of Jonathan D., 33 AD3d 996, 997; Matter of Carl F., 25 AD3d 696), we find that it was legally sufficient to establish, beyond a reasonable doubt, that the appellant committed an act which, if committed by an adult, would have constituted the crime of assault in the third degree ( see Penal Law § 120.00; Matter of Crystal R., 10 AD3d 397; Matter of Gregory B., 242 AD2d 295; Matter of O'Shanna T., 238 AD2d 287, 288). The evidence was also legally sufficient to disprove the appellant's justification defense beyond a reasonable doubt ( see Penal Law § 35.15; Matter of Y.K., 87 NY2d 430, 433; Matter of Luis S., 290 AD2d 337). Upon the exercise of our factual review power, we are satisfied that the Family Court's fact-finding determination was not against the weight of the evidence ( see Family Ct Act § 342.2; Matter of Anthony S., 305 AD2d 689, 690; cf. CPL 470.15).