A gunman who vowed online to shoot two "pigs" in retaliation for the police chokehold death of Eric Garner ambushed two New York City officers in a patrol car and fatally shot them in broad daylight Saturday before running to a subway station and killing himself, authorities said. Ismaaiyl Brinsley, 28, wrote on an Instagram account: "I'm putting wings on pigs today. They take 1 of ours, let's take 2 of theirs," two city officials with direct knowledge of the case confirmed for The Associated Press. He used the hashtags Shootthepolice RIPErivGardner (sic) RIPMikeBrown.