In one of the country's most "embarrassing" cases, German police spent years tracking down a killer only to turn the investigation back on themselves

Four years after escaping her marriage, Lobna Yakout learned her ex-husband Karim Selim is the so-called "New Cairo Serial Killer"

30 years ago on Nov. 28, Jeffrey Dahmer died in prison while serving 16 consecutive life sentences

In an excerpt from her new memoir, 'Raised By a Serial Killer: Discover the Truth About My Father,' April Balascio reveals the moment she "never thought of him in the same way again"

Monday's episode of 'People Magazine Investigates,' airing at 9/8c on ID, looks at the disturbing deaths in the Dallas area