Commonwealth v. Ahart

The defendant was convicted of murder in the first degree of the victim, Corey Davis (Corey), on theories of deliberate premeditation and extreme atrocity or cruelty. He also was *438convicted of armed assault with intent to murder of Troy Davis (Troy), and two counts of illegal possession of a firearm. On appeal the defendant asserts error in (1) the judge’s limitation of cross-examination of James Miller, the Commonwealth’s principal witness; (2) the admission of a police officer’s testimony vouching for Miller’s testimony; (3) the failure to sequester the police witness who vouched for…