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, EP2 "Deadly Summer"

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.

Mark of a Serial Killer

S2, EP3 "Deadly Design"

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

Mark of a Serial Killer

S2, EP4 "The Other Zodiac"

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.

Mark of a Serial Killer

S2, EP5 "The Smell of Death"

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.

Mark of a Serial Killer

S2, EP6 "Hunted to Death"

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.

Mark of a Serial Killer

S2, EP7 "Collar and Leash Killer"

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.

Mark of a Serial Killer

S2, EP8 "Killer Athlete"

The I-5 corridor in California is taken over by a brazen bandit who terrorizes the highway with a blitz of assaults and murders; the only clue to the killer's identity is a specific athletic tape used to bind his victims.

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.

In Ice Cold Blood

S2, EP15 "Secrets and Lies"

A beloved entrepreneur is murdered in his office; a secret double life is quickly revealed, and despite mountains of suspicion, lies and motives, his killer is not who one would assume.

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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