Summary: The San Francisco area is beset by a series of seemingly random murders without motive or pattern. The police are taunted by phone calls and letters. Could the maniac be the violent, truck driver, or the seemingly mild-mannered mailman, or even a cop? (imdb)

Genres: Suspense/Thriller, Horror

Country: USA

Directed By: Tom Hanson

Written By: Ray Cantrell, Manny Cardoza

Starring: Robert Towne, Tom Pittman, Hal Reed, Bob Jones, Ray Lynch, Mary Darrington, Frank Sanabek

More information at the Internet Movie Database