When a prominent Santa Rosa, Calif., couple is found gunned down at the offices of one of the world's most popular cartoons, detectives are left to untangle the inner workings of a decades-long marriage to solve this shocking crime.

When a father in Spokane, Wash., is found shot to death in his vehicle, detectives work for years to unmask a vicious killer who isn't afraid to silence witnesses. They eventually uncover a long-kept family secret that breaks the case wide open.