I think it is unreasonable to demand a higher standard of the police. "Don't murder" is what we ask of everyone in society. If we had a reliable way to preempti

I think it is unreasonable to demand a higher standard of the police. "Don't murder" is what we ask of everyone in society. If we had a reliable way to preemptively detect murderers we'd solve a lot of problems. Given that we don't, how could we expect to prevent murderers from being police officers? On top of that police are typically younger men - the demographic that commits almost all murders. Police always have guns. They are the kind of people willing and able to deal with hostile and potentially violent people. They have natural inclination to violence, to be able to deal with and dispense it. Personally, I'd expect the police to be more likely than average to become murderers, not less.