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When Andrea Farrington meets colleague Alex Kozak she thinks romance is possible. But suspicion and fear take over, leading to a rejection with fatal consequences.

24-year-old Caroline Nosel befriends new colleague Christopher O'Kroley, but he soon begins harassing her. After he is dismissed from work, he seeks revenge.

Kerri Harris and a colleague find a hidden camera in the ladies' room, and they make a complaint. But as police begin investigating, Kerri is found stabbed to death.

Robert Henry, an executive in Tacoma, is murdered in 1995 by a masked gunman. His wife tells police she thinks he was killed by a former business associate.

Christmas is ruined when hikers in New Mexico stumble across Roxanne Houston's shallow grave. Police rule her death a homicide but struggle to find a suspect.

To solve the murder of a respected young entrepreneur, Detective Dale Mason must navigate a tangled conspiracy and outwit a band of career criminals.

When a father of five is found dead on his kitchen floor, Det. James Colley must untangle a web of twisted relationships and bizarre fantasies to uncover the mystery.

When single dad David Heisler goes missing, clues lead detectives into the desert, but the trail stops cold. Digital forensics experts to help unravel this mystery.

When two young men are shot dead, detectives turn to digital forensics, hoping hidden data buried in the victims' cell phones will help track down the killer.

When 12-year-old Aynis Vargas dies in a seemingly random attack, investigators piece together clues from social media, cell phone data and surveillance footage.

When family man Ricky Saxton is found murdered, Investigators turn to a forensic data specialist at the FBI to help locate a missing piece of the puzzle.

After police find a young mother bound and murdered in her bedroom, her family challenges police to bring a heartless killer to justice.

Police must analyse a long emotional and rage-filled 911 call. Was it made by a distraught husband or a killer trying to cover his tracks.

In 2015 Texas, aspiring rapper Daeveion Mangum seeks fame through risky choices, but one decision drags him into a deadly spiral of violence.

In 2001, someone murders a father, sets his Florida home ablaze, and his sons disappear. Now, an exclusive interview uncovers the chilling truth.

In Texas, an intoxicated driver hits a train carrying explosive chemicals. And, a SWAT team tear down a house to arrest two murder suspects.