The verdict was based on legally sufficient evidence and was not against the weight of the evidence. There is no basis for disturbing the jury's determinations concerning credibility ( see People v Bleakley, 69 NY2d 490, 495). The evidence provided reasonable assurances of the identity and unchanged condition of the drugs in question ( see People v Julian, 41 NY2d 340, 343), and the minor irregularities in the police paperwork do not warrant a different conclusion.