MEMORANDUM AND ORDER
It is hereby ORDERED that the judgment so appealed from be and the same hereby is unanimously affirmed.
Memorandum: Defendant appeals from a judgment convicting him after a jury trial of murder in the second degree (Penal Law § 125.25) and four counts of robbery in the first degree (§ 160.15[1], [4]). He was sentenced to an aggregate term of imprisonment of 50 years to life. We reject defendant's contention that County Court erred in ordering a dual jury trial with one of the two codefendants. Here, the interests of judicial economy and the convenience of the many common witnesses outweighed the risks of error associated with the dual jury process ( see People v. Ricardo B., 73 N.Y.2d 228, 235; People v. Brockway, 255 A.D.2d 988, lv denied 93 N.Y.2d 967). We reject defendant's further contention that reversal is required based on the admission in evidence of a partial, unsigned, written statement on the redirect examination of a police witness. Although that written statement improperly bolstered the testimony of the police witness with respect to defendant's oral admissions, we conclude that the error is harmless. The evidence of defendant's guilt is overwhelming, and there is no significant probability that defendant would have been acquitted but for the error ( see People v. Crimmins, 36 N.Y.2d 230, 241-242). The sentence is neither unduly harsh nor severe. We have reviewed defendant's remaining contentions and conclude that they are without merit.