Newsday reports that the off-duty police officer who killed his wife and then himself had used his service revolver. According to Suffolk police, Francis Cole, an NYPD lieutenant, had first stabbed wife Elena in the chest with a kitchen knife in their Centereach home. Their 18-year-old daughter "tried to intervene during or just after the knife attack," but Cole hit her in the face (Newsday says it's "unclear if the blow was intentional"). He then used his .38-caliber revolver to shot his twice in the head and then turned the gun on himself. Suffolk Det. Lt. Jack Fitzpatrick said the daughter "definitely witnessed the shooting."