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Killer Instinct

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Inside the heads of some of America's most brutal, surprising and unpredictable criminal cases.

Latest episodes

aired 1,091 days ago
An entire family is gunned down in their sleep while their husband/father is out of town.
aired 1,091 days ago
An elderly couple is brutally beaten and stabbed in their own home.
aired 1,105 days ago
Mark hunts for a serial killer who's preying on young college girls.
aired 1,105 days ago
A mother of triplets is strangled to death.
aired 1,112 days ago
Members of a California family are found executed at home.
aired 1,112 days ago
A teenage girl is found shot to death along the banks of the Sacramento River.
aired 1,119 days ago
A woman lures two men to a New Hampshire farm to torture and kill them.
aired 1,119 days ago
Mark matches wits with a wife killer and must convince him to confess.
aired 1,126 days ago
Mark works with local investigators in the Pacific Northwest to track down a mother and her son.
aired 1,126 days ago
Mark finds himself on the trail of another Washington madman who has killed 18 people.