On the evening of March 10, 2005, 13-year-old Bianca Noel Piper was dropped off on McIntosh Hill Road in Foley, Missouri, by her mother after a disagreement. The eighth-grader, diagnosed with ADHD and severe bipolar disorder, had been using walks as a therapeutic technique suggested by her therapist. That night she wore a gray Adidas sweatshirt, blue jeans, white sneakers, and carried a flashlight. She is described as 5 feet 6 inches tall, 185 pounds, with brown hair and brown eyes, pierced ears, and scars on her arms, legs, and abdomen.

Extensive searches that included horseback teams, four-wheelers and search dogs turned up nothing. Early concerns that she might have become lost in freezing temperatures shifted to a possible abduction; Bianca had no history of running away. Her mother and her mother’s boyfriend passed polygraph tests and were cleared. Investigators have pursued hundreds of leads, including inquiries as far away as Oregon and a 2007 check for a possible link to Michael J. Devlin, but no evidence connected him to Bianca. In February 2023 a nearby septic tank was drained and evidence is being re-examined with new forensic technology, but the case remains cold.

If anyone remembers seeing Bianca on McIntosh Hill Road that night or has information that could help, please come forward.