Comment by Amezarak

Most of the time there’s a brief internal investigation and then nothing happens to them, because they’re given enormous latitude and discretion, even when the victim was totally innocent. If you want a very notorious and similarly politicized example, look at what happened to the federal agent that killed Vicki Weaver: the feds refused to do anything to them, and the local case was initially shut down due to sovereign immunity for federal agents and then later abandoned.

If you want a more recent famous case, consider the shooting of Craig Robertson: the FBI says he was armed and shot him dead, agents cleared after an internal investigation and we’ll never know if he was armed or not (I’d guess yes.) That’s it.