'by definition' really.

your post says that every cop that has ever killed someone is conservative. Wow that would be quite a conspiracy.

So you dont know anything about socio and psychological factors contributing to killing someone. How adverse, as a species, we really are about killing one another. There are a TON of psychological pressures and influencing required to get people to actually shoot someone. Keep in mind Im a veteran of the iraq war, have a biology degree and have read constantly since 2004 about killing psychology. So I can speak firsthand about how powerful the 'protect your own' and/or 'protect the department/institution' pressures might be. To jump to a conclusion along the lines of your statement, if conservatives are so bad, how could a 'liberal' take a stand or speak out and not lose his job, not lose his career. If you cant acknowledge those pressures and fears exist, you're kidding yourself.

if this data were ever compiled there would be plenty of 'liberal' and non conservative police in there too.