
Mark of a Serial Killer
Investigators in East Baton Rouge, La., hunt for a serial murderer who carefully carves up and cuts the bodies of his victims after death.

Investigators in East Baton Rouge, La., hunt for a serial murderer who carefully carves up and cuts the bodies of his victims after death.

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.

El Paso investigators race to track down a ruthless killer who is burying his victims in shallow desert graves, dead or alive.

A Houston killer taunts the media and authorities as he uses homemade ligatures to murder his victims.

A cold-blooded killer conceals his victims' bodies with trash, discarding them like garbage in the back alleyways of Los Angeles.

A killer crisscrosses the Midwest leaving a string of victims along the interstate, but when he realizes investigators are hot on his trail the murderer suddenly changes his mark.

Chicago detectives believe that a serial killer is using classified ads to lure and murder his victims.

Chicago police investigate the murders of several women, whose bodies are discovered in abandoned buildings barefoot.

Numerous women are found dead by the side of the road with a unique ligature that looks like a dog collar and leash detectives are stumped until a 17-year-old girl manages an escape from a vicious kidnapper, leading police to a serial killer.

Police find a string of murdered women in shallow graves in very remote areas of the Alaskan wilderness after months of searching, police zero in on a local family man living a double life that no one suspects.

A rash of young men goes missing around Chicago during the 1970s when bodies start washing up in the river, a pattern emerges a small piece of evidence leads police to the home of a model citizen, where his furnace puts the suspect in the hot seat.

In the 1990's, New York is on edge as a killer leaves coded clues at crime scenes and declares his compulsion to choose victims by their birth signs.

Brooklyn shop keepers are afraid of closing time as a killer shoots his victims while locking up their stores.

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.

Minnesota police hunt for a killer caller who confesses to a string of murders in a chilling, high-pitched voice, begging for forgiveness no one can identify him until one woman survives a brutal attack.

When a schoolteacher is gunned down in public, a known felon's DNA and phone records link him to the crime however, after investigators arrest the man, they discover the real killer might actually be someone else entirely.

A crazed driver goes on a seven-hour shooting spree, killing six people and critically injuring two.

After getting a call that a wife and mother had been missing for 10 years, sheriffs launch an investigation that uncovers a web of lies that leads them to the truth.

Investigators speak for the first time on one of the most baffling cases they've encountered, exposing the truth about what happened to Shanann Watts and her two daughters at the hands of a seemingly devoted husband and father, Chris Watts.

After the naked body of an Ohio State senior is found, investigators bring in a suspect for questioning they play a dangerous game of give and take hoping to get the truth and bring justice to the victim and her family.