The traditional penalty for treason is death by hanging, at best. This is treason against the most fundamental values of what our nation is supposed to stand for. If you do this kind of thing, you have committed an unforgivable offense against everything this nation is supposed to stand for. If you're a police officer that flagrantly violates someone's rights, you should hang for it. If you're a police officer that plants evidence on someone, you should hang for it. If you're a police officer that shoots an innocent person, you should hang for it.
I have zero problem with holding police officers to a much higher standard that regular citizens. They want to go around calling themselves "officer?" Fine. I have no problem holding them to a brutal system of military justice. Make them earn their titles for a change.
I have no problem holding police officers to a higher standard of behavior than the general populace.