Murder By Numbers

A series of murders in California bear eerie similarities, but police have trouble connecting them -- until unique ballistics, mysterious surveillance and a bloody cell phone lead them to three criminals on a deadly revenge spree.

The streets of Atlanta, GA, are shaken as the horror of the "Necktie Killer" strikes the city with fear. Detectives from neighboring counties piece together clues and distinctive apparel left behind at each crime scene.

A man is murdered by an intruder in Texas, leaving his wife to witness a disturbing detail: The killer was wearing a clown mask. When three more are killed by the same clown, police realize they're dealing with a serial killer.

Dallas has a dark side, but nothing compares the horror of a series of women found murdered with their eyeballs removed. A pair of beat cops use their street savvy to lead detectives to a sadistic killer and his bizarre motive.

Within a month, four men in Orange County, CA, are brutally stabbed. No one makes a connection to a gruesome double murder of a mother and son two months earlier, except a man sitting in prison for killing his family.

When a sheriff's wife answers the door of her Alexandria, VA, home to a blaze of gunfire, theories buzz throughout the community. However, when more citizens are shot at their own front doors, everyone wonders who could be next.

A twisted murderer preys on young women in Bellevue, WA, leaving their bodies sadistically posed. As police work to draw a crucial connection, an unconventional clue leads them to an unlikely killer hiding in plain sight.

A monster hunts the streets of Baton Rouge, leaving three women raped, murdered and sadistically posed and everyone in town on edge. But when one brave woman survives a vicious attack, evidence leads police to the hunter and eventually justice.