The Laughing Policeman

When a gunman opens fire on a crowded city bus in San Francisco, Detective Dave Evans is killed, along with the man he'd been following in relation to a murder. Evans' partner, Sgt. Jake Martin, becomes obsessed with solving the case.

Cast: Walter Matthau, Bruce Dern, Louis Gossett Jr., Albert Paulsen, Anthony Zerbe, Val Avery, Cathy Lee Crosby, Mario Gallo