The trial court erred in admitting 404(b) evidence obtained as a result of an earlier arrest when the earlier charges were dismissed for insufficient evidence and the probative value of the evidence depended on the defendant’s having committed those offenses. The court distinguished cases where several items are seized from a defendant at one time but the defendant is tried separately for possession of the various items; in this context, evidence may be admissible even if there has been an earlier acquittal, if the evidence forms an integral and natural part of an account of the present crime.