Commonwealth v. Brennan

After a jury trial in the Superior Court, the defendant was found guilty of murder in the first degree, unlawfully carrying a firearm, and possessing a firearm with a defaced serial number. The defendant filed timely appeals of all three convictions. Here, however, he raises issues only in relation to the murder conviction and regarding criminal responsibility. *359Thus, he waives appeal on the other indictments. He also seeks relief under G. L. c. 278, § 33E (1984 ed.). We reverse his murder conviction.

The defendant contends that the trial judge improperly excluded testimony of Dr. Maxwell N.…