Appeal by the defendant from a judgment of the Supreme Court, Kings County (Lombardo, J.), rendered April 23, 1984, convicting him of murder in the second degree (two counts), kidnapping in the first degree and criminal possession of a weapon in the second degree, upon a jury verdict, and imposing sentence.
Ordered that the judgment is affirmed.
The defendant failed to object to the introduction at trial of evidence which allegedly referred to uncharged crimes. Therefore, the issue has not been preserved for appellate review (see, CPL 470.05 [2]). In any event, the defendant’s contentions with regard to this issue either indicate that harmless error occurred (see, People v Crimmins, 36 NY2d 230, 241-242) or are without merit.
The defendant contends that his trial attorney did not provide effective assistance of counsel because he failed to impeach the credibility of a certain prosecution witness, failed
The allegations contained in the defendant’s supplemental pro se brief with respect to his claim of ineffective assistance of counsel are based on matters dehors the record and are more properly raised in a motion pursuant to CPL 440.10. Bracken, J. P., Kunzeman, Spatt and Harwood, JJ., concur.