An old man walks into a Police Station.
He asks for help.
A Police Officer on duty asks a short question. The old man is scared and starts sweating.
The officer grabs that old man from behind and puts him on the ground. Before long the officer starts beating him with his fist. Everyone in the Police Station watches in shock.
The old man dies.
No complaint is filed against the officer. No disciplinary action is taken.
The old man,an outstanding citizen, had no legal troubles what-so-ever. He was not carrying any weapon.He had not committed any crime that the officer knew about. The officer did not know the old man. The officer was a rational person with solid reputation.
And NO, the officer did not go crazy. And let's say this happened in US