| Director: Tom Hanson, Robert Birchall, Wilson S. Hong |
Writer: Manny Cardoza, Ray Cantrell |
| Run time: 87 minutes |
Release date: 1971-04-07 |
| Floor location: Horror |
Format: Blu-ray |
| Production Countries: United States of America |
| Spoken Languages: English |
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?
