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Mark of a Serial Killer
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Woman Calls 911 After Mysterious Knocks On Her Door At Night

CLIP04/13/21
Also available on the nbc app

Robyn Oldenburg, a Bellevue resident, had heard reports of a serial killer active in her area. She called 911 one night when a stranger kept knocking on her door.

Available until 05/13/21
Appearing:
Tags: oxygen, True Crime, serial killers, Mark of a Serial Killer
S3 E32 minTV-14HighlightReality and Game ShowPrimetime
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