You are likely correct that the so-called police will not face any punishment for killing someone they were supposed to protect, but that's not how rights and the law work under a functioning judicial system. Good shoot or bad shoot, it's about what the victim was
doing and what reasonable judgement the police could make about his actions. Just because someone (like a presidential candidate) invites someone else to commit a felony (like illegally interfering in an election) doesn't absolve anyone of wrongdoing under the law.