Heim was last seen leaving her west Tulsa, Oklahoma home at approximately 10:00 p.m. on December 26, 2005. She has never been heard from again. Her car, a tan 1988 Buick Electra Park Avenue with the Oklahoma license plate number TNM937, was located the next day on Farm-to-Market 1159, approximately twelve miles north of Clarksville, Texas, near the Oklahoma state border. The vehicle's doors were open and it had been wiped clean of prints. All of Heim's belongings, including her purse, keys, Social Security card, driver's license, money and a toll receipt, were inside it. A photo of the car is posted below this case summary. Heim's loved ones stated she had no connection to the Clarksville area and they do not know why she would go there.

Heim testified against her ex-husband and others at a methamphetamine trial months before she went missing. It is unclear whether the trial is connected to her case. Although she has a history of depression, Heim was reportedly in good spirits at the time of her disappearance. Foul play is suspected in her case.

Above: Heim's car