You're allowed to defend yourself, with arms and lethal violence, against unlawful police. There's a Supreme Court case about it called John Bad Elk versus US w

You're allowed to defend yourself, with arms and lethal violence, against unlawful police. There's a Supreme Court case about it called John Bad Elk versus US wherein police were trying to arrest John Bad Elk for shooting guns on his own land, which was legal, and when the police made to draw on him he shot them, killing at least one officer, and was found to have acted within the law. A more recent and more famous example is the rapper Tupac who witnessed police beating up a guy for no reason. Tupac grabbed a gun and told them to stop, and when the police shot at him, he shot back wounding one, and wasn't found to have committed any crime. Randy Weaver shot and killed a federal agent and was exonerated at trial. These are just examples from memory. I'm sure if you looked you'd find many more. It may not be wise to shoot out with the police, and you'd better be certain you're right, but you're absolutely permitted to use your guns on the police and kill them in some circumstances.