48 Hours: Season 36, Episode 15

36 - 15: For the Love of Cayley Mandadi

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.