10 pts for the first person to solve this easy riddle!?
Johnny's Wife: I didn't kill him. i was sleep all day.
Plumber: I didn't kill him. I was fixing the Toilet
Johnny's sister: why would i kill him? He is my bro'
Johhny's best friend: I didn't kill him, i was playing Chess with his wife all day.
Base on the statements, who KILLED Johnny?