Mesa police say a man who stopped to help a couple after a crash on the Loop-202 is dead after a man shot and killed his wife and then shot the Good Samaritan. Detective Nik Resheta says the woman had called 911 about her husband earlier but told police that she was ok and later called, saying her husband was going to kill her.

Resheta says that the responding officers heard the gunshots and witnessed the suspect with the weapon but were too late to save either victim.