Here's everything you need to know about accused Gilgo Beach Serial Killer Rex Heuermann, his family, his alleged victims, and what he's charged with.

Sierra Jane Inscoe met Carson Sistrunk via Snapchat before meeting him in real-life Mississippi, where she shot him. Learn ...

Find out more about the latest developments in the case of missing mom Crystal Rogers, last seen in July 2015.

Learn more about the "Hog Trailer Killer" Daniel Conahan Jr., as told in Oxygen's Unknown Serial Killers of America.

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Find out what happened to Margaret Abernathy, 66, found breathing but unresponsive in bloody pajamas in her Georgia home after her daughter called 911.

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Mahaska County seems like a peaceful, quiet place. "This is rural Iowa," Michael Berrier, an officer with the Iowa Division of Criminal Investigation, told "Killer Siblings," airing Fridays at 8/7c on ...

Andrea Zamperoni's friends and coworkers speak about his happy, upbeat personality even in high stress environments.

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Preview: A grim detail in security footage reveals that Nada Houranieh's fall from a second-story window may not have been accidental.

Preview: Security footage reveals what initially appeared to be a fall from a second-story window as something much darker.