The Mark of a Killer - Season 3 (2021)

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.

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.

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.

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

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

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

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.

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

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.

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.

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