BOSTON — A judge ruled Tuesday that jurors can be shown video of an 8-year-old boy accidentally shooting himself in the head with a submachine gun at a gun show, setting up an unusually grisly courtroom scene in the manslaughter trial of a former police chief who organized the event. Judge Peter A. Velis of Hampden Superior Court in Springfield, Mass., is still deciding whether audio from after the shooting — in which the boy can be heard screaming and his father... (GunPolicy.org)