1. Ice Cold: Levi King

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. 11 April 2013. 60 min

Levi King kills two Missouri residents in 2005, then travels to the Texas Panhandle to continue his murderous ways.

2. Mad Maks: Maksim Gelman

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. 18 April 2013. 60 min

Maksim Gelman discusses the four murders he committed in New York City in 2011.

3. Monster Inside: Robert Lopez

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. 25 April 2013. 60 min

A "push-button killer" who served time for stabbing a woman unleashes his hidden rage on a new girlfriend.

4. Twisted Love: Dena Riley

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. 2 May 2013. 60 min

A woman and her boyfriend, a convicted rapist, unleash their violent sexual fantasies upon two innocent victims.

5. Payback: Earl Forrest

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. 9 May 2013. 60 min

A Missouri man kills two people at a friend's home, then continues the bloodshed when authorities come looking for him.

6. Gene Meredith: Devil Inside

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. 1 April 2014

Detectives in Great Falls, Mont., investigate the grisly stabbing death of a former corrections officer; the killer reveals his thoughts behind the crime.