I certainly don’t believe for a moment there aren’t cops who shouldn’t be on the job. As I said upthread somewhere, I’ve known people who have had really unfair encounters (none ended up dead, thankfully).
On the other hand, I don’t for a moment believe that most cops are bad guys, otherwise you would hear many many more of these stories. But, I don’t feel sorry for a bad cop who goes to jail. I do think they should be held to a higher standard.