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Mark of a Serial Killer

Witness Claims She Saw ���Grim Sleeper��� Serial Killer

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A woman came forward to say she saw the killer shoot a victim and cover her up with a mattress. She had a name, too. Was she on the right track?

Tags: Mark of a Serial Killer, True Crime, oxygen, serial killers
S3 E71 minTV-14HighlightReality and Game ShowPrimetime
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