S9E11: Johnny Black; Stranger Than Fiction

In the first of two homicides less than ten blocks away, detectives head out to the shooting of man in the middle of the day. They investigation leads to a suspect who is a friend of the victim. Then, shots ring out and a young man is gunned down by a man on a bike. When a witness comes to them, they have a hard time believing her story. Is truth really stranger than fiction?