He got scared because the nog was trying to pull up his pants and thought he was pulling out a gun. I really don't care if cops start get killed on sight every single day or not, but what people don't understand is in America, niggers are extremely dangerous. It's not racist or exaggeration, they literally dindu every single fucking day and they will either take a swing at you or pull something on you even as an officer. And on the tiniest chance it's not a nig, then a spic or white trash will do it, and then there's our drug problem on top of that. This is why cops are so terrified and shoot before asking questions. There was a very real chance the guy could have turned around and shot the cop if he decided to spare shooting him.