Kathleen Mohn, 48, disappeared from King of Prussia, Pennsylvania, on the evening of December 3, 1999. She told family she planned to drive to Levittown to spend the weekend with her boyfriend, a trip she had made frequently. Her husband reported she left their home about 9:00 p.m., but Kathleen never arrived and was not heard from again.

Her green 1993 Ford Explorer was found abandoned in the parking lot of a KFC in Tullytown on December 13. The vehicle contained her eyeglasses, purse, cigarettes, and prescription medication; her wallet and the Christmas gifts she intended to wrap were missing. The SUV was unusually clean, the driver’s seat pushed back as if for a much taller person, and multiple air fresheners were present — items inconsistent with Kathleen’s habits. A cadaver dog later indicated the scent of human remains inside the passenger compartment.

Investigators focused on Kathleen’s personal life. She was living with an estranged husband, Dr. Thomas Mohn, while dating another man; she had recently consulted a divorce attorney and learned she could receive a substantial share of her husband’s dental practice and monthly support. The boyfriend was cleared; the husband is a person of interest and has not fully cooperated with police. Her case remains open and unresolved. Does anyone who knew Kathleen or saw her in King of Prussia or Levittown in early December 1999 have information to share?