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Video footage, police interview tapes and courtroom footage reveal the double lives of the US's most terrifying killers and abductors before they were caught.

Video footage, police interview tapes and courtroom footage reveal the double lives of the US's most terrifying killers and abductors before they were caught.

A college student sends his sister a mysterious text about leaving the country. Later, his body turns up in a lake, weighed down by a backpack full of rocks.

A Georgia man suffers 17 stab wounds while on a hunting trip. Another man disappears without warning - the only clue is his burned-out car. What happened?

The most extraordinary police chases are captured on camera in a fast-paced, adrenaline- fuelled world where criminals will do anything to escape.

The most extraordinary police chases are captured on camera in a fast-paced, adrenaline- fuelled world where criminals will do anything to escape.

Debbie Smith gets the call every mother fears: her son, Matthew, has died at college. Police learn it was more than an accident - could those closest to him be to blame?

When a mother vanishes without a trace, police believe she left by her own volition. But, her mum knows she would never abandoned her children and vows to find her.

A beautiful student is murdered in her Baton Rouge home. The police have to race against the clock to prevent a serial killer from striking again.

Whenever families get together, there's bound to be tension. But when two kissing cousins start carrying on, their relationship will end with nine people dead.

Medium Amy Allen and retired homicide detective Steve DiSchiavi combine their unique skills to solve unexplained paranormal events.

Demon hunter Tim Wood and his team investigate the darkest hauntings across America. They use unique scientific methods to confront demonic forces.

One of the most passionate paranormal teams in America, the Tennessee Wraith Chasers, investigate the most haunted and terrifying towns in the United States.

One of the most passionate paranormal teams in America, the Tennessee Wraith Chasers, investigate the most haunted and terrifying towns in the United States.

Demon hunter Tim Wood and his team investigate the darkest hauntings across America. They use unique scientific methods to confront demonic forces.

The most extraordinary police chases are captured on camera in a fast-paced, adrenaline- fuelled world where criminals will do anything to escape.

The most extraordinary police chases are captured on camera in a fast-paced, adrenaline- fuelled world where criminals will do anything to escape.