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

S1, EP6 "An Appetite for Murder"

Texas authorities have a killer riding the rails and leaving a literal trail of bread crumbs after eating at victims' tables; when more murders are linked, the FBI names a Most Wanted suspect and a national manhunt for The Railroad Killer ensues.

Mark of a Serial Killer

S2, EP1 "Killer Caller"

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.

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.

Homicide for the Holidays

S4, EP5 "Halloween Horror"

A teenage boy discovers a real-life horror scene in his home on Halloween morning; investigators must determine if the triple homicide is a random act of evil or a premeditated slaughter by someone close to the family.

Homicide for the Holidays

S4, EP6 "All Hallow's Evil"

After a single young mother fails to show up for work on Halloween, her family and friends suspect murder.

Homicide for the Holidays

S4, EP7 "Cold Turkey"

A prominent couple are found brutally murdered in their Montgomery, Ala., home on Thanksgiving night, leading detectives on a cat-and-mouse chase spanning thousands of miles across multiple states.

Homicide for the Holidays

S4, EP8 "Silent Night Murders"

When a young man and woman are found shot execution-style in a mall parking lot in the early hours of Christmas Eve, investigators believe a love triangle might have led to these brutal murders.

Homicide for the Holidays

S5, EP1 "Red, White and Blood"

When a young woman goes missing after a July 4th beach party, investigators have few clues to go on until a twist in the case reveals she might be the latest victim of a predator terrorizing the area.

Homicide for the Holidays

S5, EP2 "Deadly Fourth"

An abandoned car filled with blood leads investigators on the trail of a missing woman and her teenage daughter, who never showed up to the family's July 4th party; when their remains are found in a pond, everyone in their small town is a suspect.

Homicide for the Holidays

S5, EP3 "The Big Bad Wolf"

After a woman and her unborn child are stabbed to death on Halloween by a man wearing a wolf mask, investigators must calm the community and find the killer before he strikes again.

Homicide for the Holidays

S5, EP4 "Recipe for Murder"

When a young woman home from college ends up murdered in her home and the tools of her demise turn out to be the rolling pin and carving knife the family planned to use for Thanksgiving dinner, investigators struggle to solve this holiday horror.

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