A Police Officer was walking passing a restaurant when he heard someone scream – “No Jame, not the gun!” He ran inside and saw a doctor, a lawyer, a milkman, and a dead body on the floor. He promptly walked over to the milkman and arrested him. He didn’t witness the shooting and there was no clear evidence to prove who shot the person and no one told him who the killer was.
How did the police officer instantly know it was the milkman?