A New York City Police officer jumped into action using an empty bag of potato chips and tape to help save a man who was stabbed in the chest, officials said. Officer Ronald Kennedy was called to the scene in Harlem, on July 7. The graphic bodycam video gives a play-by-play of the officer's heroic actions. He tells a bystander to get tape and a bag of chips, and fashions a tourniquet with them. Doctors say the man would likely have bled to death if not for the officer’s quick action.