THE STORY OF ONE OF THE MOST BIZARRE MASS MURDERS EVER RECORDED. AND THE GIRL WHO ESCAPED WITH HER LIFE.

In the fall of 2010, in the all-American town of Apple Valley, Ohio, four people disappeared without a trace: Stephanie Sprang; her friend, Tina Maynard; and Tina's two children, thirteen-year-old Sarah and eleven-year-old Kody. Investigators began scouring the area, yet despite an extensive search, no signs of the missing people were discovered.

On the fourth day of the search, evidence trickled in about neighborhood "weirdo" Matthew Hoffman. A police SWAT team raided his home and...