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When 15-year-old Kayla Berg isn't home after a night out, her loved ones think she's staying with friends. After six days, her last known location raises suspicion.

When law enforcement finds James Nibbe dead after a home invasion, they must dig beneath the surface of Lake Crystal, Minnesota, to root out the killer.

Officers are called to the scene as two women get into a fight in Burton and a police dog has its day after getting its teeth in to a suspected criminal.

An attempted arrest turns nasty as a suspected thief gets violent with officers and a brazen burglar nearly eludes police in a daring escape attempt.

When a popular teenage dancer suddenly disappears one day after practice, friends reveal to police that a man stalked her just days before her disappearance.

A 7-year-old cheerleader vanishes at a small Kentucky town's biggest youth football game of the year. When she's found murdered, panic takes over.

In Florida, a carjack sparks a police chase over land, air, and sea, with the suspect stealing multiple vehicles in a desperate bid to outrun the law.

Fear grips San Diego after police find a murdered woman's body tossed over a highway bridge. Investigators are led to a suspect that shocks everyone.

Investigators use surveillance video to uncover the secret behind a shooting. When a woman is murdered in her own home, police use the RTCC to track a killer close to home.

As Washington, DC burns, police realise they are hunting the most prolific arsonist in US history, and he has been getting away with it for decades.

The Twelve Signs He Will Die. A copycat Zodiac killer terrorises New York City while keeping cops guessing his identity. It falls to veteran NYPD detectives to outwit him.

Officers are called to the scene as two women get into a fight in Burton and a police dog has its day after getting its teeth in to a suspected criminal.

An attempted arrest turns nasty as a suspected thief gets violent with officers and a brazen burglar nearly eludes police in a daring escape attempt.

When a popular teenage dancer suddenly disappears one day after practice, friends reveal to police that a man stalked her just days before her disappearance.

A 7-year-old cheerleader vanishes at a small Kentucky town's biggest youth football game of the year. When she's found murdered, panic takes over.

An attempted arrest turns nasty as a suspected thief gets violent with officers and a brazen burglar nearly eludes police in a daring escape attempt.

In Albuquerque, Mike Snyder starts a family with his partner, capturing it on home video. But after being diagnosed with a serious illness, he vanishes.

US Air Force sergeant Nathan Paet and his family appear to live a blissfully normal life - until a horrific attack leads to their destruction.

When 15-year-old Kayla Berg isn't home after a night out, her loved ones think she's staying with friends. After six days, her last known location raises suspicion.

When law enforcement finds James Nibbe dead after a home invasion, they must dig beneath the surface of Lake Crystal, Minnesota, to root out the killer.

In California, an intruder brutally attacks and kills Joan Dawley. Secret home movies uncover a shocking tale of deceit, and a monster lurking behind the scenes.

When Lanny Horwitz is found murdered in his own home, it unleashes a shocking tale of jealousy and infidelity, leaving every member of the family a suspect.

19-year-old Angel Garcia disappears after riding his dirt bike. Friends say he was chased by an SUV before he vanished. Months later, a possible sighting raises hopes.

When it dawns on George and Margaret Keller that their son hides an evil secret, they are forced to make a heartbreaking choice whether or not to betray their own child.

When a father-of-three is shot dead in a hail of gunfire, police think there is more than one suspect. But Demery is unprepared for how many killers are at large.

The bullet-ridden bodies of three friends are found in a car in Shreveport's most notorious area. Demery delves into the city's dark underworld for answers.

A young woman reports a brutal home invasion and the shooting of her mother and father. But when police interview her, they uncover an elaborate web of lies.

A gunman shoots a young man and woman on their way home from work. Detectives learn that this is no random attack but the twisted plan of a psychopathic stalker.

A woman's body is found strangled near a country road. Investigators learn the suspect is a prolific serial killer who raped and murdered eight women.

I Guess My Life Is Over Now. A mother is found dead after reporting her son to the police. When he turns himself in, his confession isn't just cold-hearted, it's psychopathic.

A home health care aide's body floats in a rural Connecticut creek. Detective Garritt Kelly joins the investigation to bring justice to a community gripped by fear.

Police find the body of a man hidden inside a trash can. With few leads to go on and suspects at every turn, police aren't sure who they can trust.

When a young couple goes missing in Eureka, Utah, detectives from neighbouring counties work together to track down their bodies.