For True Crime buffs who love the twists and turns of a criminal investigation, Oxygen True Crime has a deep library of shows that ask the provocative questions, run exhaustive investigations and look for ways that  justice always is served

Mark of a Serial Killer

S2, EP9 "Bound to Kill"

A serial killer taunts Wichita, Kan., for decades by sending brazen letters and taking credit for horrific kills; at the introduction of the computer era, the killer gets sloppy and accidentally leaves a digital clue.

Mark of a Serial Killer

S2, EP10 "Keys to a Killer"

In the 1990s, Louisiana is terrorized by multiple serial killers; the Zachary Police Department discovers the key to solving their cases when a pattern emerges with personal items missing from each local victim.

Mark of a Serial Killer

S3, EP1 "The I-40 Killer"

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

Mark of a Serial Killer

S3, EP2 "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.

Mark of a Serial Killer

S3, EP3 "The Charmer"

After a series of women in the Seattle area are found brutally murdered with their bodies posed, police realize that they might have a killer stalking the area nightclub scene who is able to charm his victims into submission.

Mark of a Serial Killer

S3, EP4 "The Englewood Killer"

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

Mark of a Serial Killer

S3, EP5 "Classified to Kill"

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

Mark of a Serial Killer

S3, EP6 "The Interstate Killer"

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.

Homicide for the Holidays

S5, EP6 "Countdown to Murder"

When a college student is found dead on the side of the road, detectives are faced with the possibility that the killer might have been one of the many partygoers ringing in the new year.

In Ice Cold Blood

S2, EP16 "Mother vs. Son"

A man is found dead in the shower, and police have only two suspects, but to figure out who killed him and why, is not as cut and dry as it may seem.

In Ice Cold Blood

S3, EP1 "Swimming With Sharks"

A teenage girl is found beaten to death at the neighborhood pool, launching her father on a mission to catch her killer that ultimately changes crime fighting forever.

In Ice Cold Blood

S3, EP2 "Widowed Witness"

A brutal attack leaves witness to a murder; but when the police find the killer, it turns out the intended victim, and the motive, were not what anyone imagined.

In Ice Cold Blood

S3, EP3 "Guilty as Charged"

When a prominent attorney is found savagely stabbed to death in her office, investigators find themselves with a long list of suspects from violent felons to lesbian love triangles; in the end, they find a killer as cold as they come.

In Ice Cold Blood

S3, EP4 "Family Ties"

What originally looks like a heart attack turns out to be a calculated execution; soon, detectives unravel a murder plot that hits a little too close to home.

In Ice Cold Blood

S3, EP5 "Baby Mama Drama"

After a woman is found shot dead, with her 9-month-old daughter in the next room, detectives uncover a web of late-night encounters, secret lovers and seething jealousy.

In Ice Cold Blood

S3, EP6 "Two Prints"

A woman is found stabbed to death in her apartment; with a long list of admirers, investigators uncover secret obsessions leading to a sadistic killer suspected by no one.

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