Commonwealth v. Perez

A jury in the Superior Court convicted the defend ant of murder in the first degree in the shooting death of Henry Guzman, and of intimidation of a witness. The defendant appeals from the convictions, claiming that the trial judge committed reversible error when he (1) questioned the venire about whether the potential jurors believed the Commonwealth could prove its case beyond a reasonable doubt without presenting scientific evidence; (2) failed to instruct the jury pursuant to Commonwealth v. Bowden, 379 Mass. 472 (1980); (3) permitted a witness to express an opinion as to the culpability…