A Doctor, a Lawyer and a Milkman riddle
A cop was walking past a restaurant when he heard someone scream -
"No John, 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 apparent evidence to prove
who shot the person and no one told him who the killer was.
How did the policeman instantly know it was the Milkman?
"No John, No the gun" implies that the murderer is a man.
Milkman is the only man as the doctor and the lawyer are woman.