On June 28, 2014, in the small town of Cottonport, La., 29-year-old Megan Parra was discovered in her home by her parents, Missy and Steve Ducote, with a gunshot wound to her head. Parra's husband, Dustin Parra, showed up minutes later and tried to save her. It was too late. She was taken off life support the next day. Her death was ruled a suicide, but Steve Ducote was convinced there was foul play.

Cayley Mandadi was a 19-year-old sophomore at Trinity University when she arrived at a hospital in Texas on Oct. 29, 2017. She was nearly naked, bruised and not breathing. Her sometime boyfriend Mark Howerton told doctors they'd taken ecstasy at a music festival and she passed out after consensual sex in his car. She died at the hospital. Mandadi's mother and stepfather believed something far more sinister had happened and set out to prove it.