Mark of a Serial Killer

Chaos descends on Phoenix as two serial killers compete for the media's attention and the bodies pile up faster than the police can investigate.

In the summer of 1976, the NYPD are chasing a man shooting at couples in parked cars with a gigantic,.44 caliber handgun; he taunts the city with terrifying letters until police get a lead about a suspect who has shot a neighbor's dog.