Alissa Marie Turney was 17 and a junior at Paradise Valley High School when she vanished from Phoenix on May 17, 2001. Her last independently corroborated sighting was at school that morning; a classmate and her boyfriend each said she spoke with them that day. Her stepfather, Michael Turney, later reported picking her up, taking her to lunch and returning home alone after running errands, at which point he said a note was found claiming she was going to California. He reported her as a runaway.

Early leads included a short phone call Michael said he received from a payphone in Riverside, California, and an aunt who reportedly could have sheltered Alissa. But investigators noted troubling details for a presumed runaway: roughly $1,800 in savings was untouched, her cell phone remained at home, and a classmate said planned evening plans never happened and Alissa never made contact. Over time detectives shifted focus to the home environment, where Sarah Turney later described hidden recording devices and strict rules. A 2008 search of the Turney residence found explosives and firearms; Michael Turney later pleaded guilty to possession of unregistered destructive devices, but no evidence then located Alissa.

Sarah Turney has been a persistent public advocate for answers about her sister. Does anyone who knew Alissa, her friends, classmates or coworkers remember her plans in May 2001 or seeing her after school that day?