Mark of a Killer Season 3, Episode 7: The Grim Sleeper

The I-40 Killer

A killer is murdering and mutilating young women along the Route 40 corridor in Delaware. But when investigators set up an undercover operation, the hunter soon becomes the hunted.

43 min

The I-95 Killer

After multiple men are discovered brutally murdered, investigators determine that each victim was last seen with a handsome stranger they met in a bar. Police ask the public for help in tracking down a dangerous drifter before he kills again.

43 min

The Charmer

A series of women in the Seattle area are found brutally murdered, their bodies posed. Police realize they may have a killer stalking the area nightclub scene, one who is able to charm his victims into submission

43 min

The Englewood Killer

Chicago police are investigating the murders of several women, whose bodies are discovered in abandoned buildings barefoot. Evidence indicates there is one offender, now police need to locate him.

43 min

Classified to Kill

Chicago detectives believe a serial killer is using the classified ads to lure and murder his victims. The investigation is set ablaze when flames obliterate evidence, until police make a shocking discovery.

43 min

The Interstate Killer

A killer crisscrosses the Midwest leaving a string of victims along the interstate. When investigators are hot on the highway killer’s trail, the murderer suddenly changes his mark.

43 min

The Tourniquet Killer

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

43 min

Deaths in the Desert

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

43 min

Summer of Fear

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.

43 min

The Monster

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

The Bayou Strangler

When multiple victims' bodies are dumped around Louisiana's bayou area, a task force is formed to catch a killer who police believe may have strangled over 20 men.

The Skull Crusher

Police in Hartford, Connecticut investigate a string of ruthless killings in the Asylum Hill area committed by a killer with a devastating mark that leaves his victims nearly unrecognizable.

The D.C. Sniper

A serial sniper terrorizes the entire D.C. metro area by discreetly targeting random victims out in public and in plain sight.