[HiTech RedNeck]

"Military" could have had a lot to do with it. Veterans are wound tighter than your average civilian Joe. Did he forget for a moment that he was a policeman, not a soldier? Could (tin foil hat time) his mind have started to crack?

[MissAmericanPie]

It was his weapon that cracked, we all know that no one is responsible for their own actions anymore.