Phoenix Coldon has been missing since Dec. 18. She was last seen in the driveway of the family's St. Louis County home at about 3 p.m. Roughly three hours later, Coldon's black 1998 Chevy Blazer was impounded by police after it was discovered about a 25-minute drive from her home, at Ninth Street and St. Clair Avenue in East St. Louis. The keys were in the ignition with the motor running and the driver's door open.

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Phoenix Coldon has been missing since Dec. 18. She was last seen in the driveway

 of the family's St. Louis County home at about 3 p.m. Roughly three hours later, Coldon's black 1998 Chevy Blazer was impounded by police after it was discovered about a 25-minute drive from her home, at Ninth Street and St. Clair Avenue in East St. Louis. The keys were in the ignition with the motor running and the driver's door open.

Coldon's vehicle was towed by the East St. Louis Police Department and entered into the agency's computer system as an abandoned vehicle. Her family did not discover it was in police custody until Jan. 1. It remains unclear why the family was not notified, and authorities have not returned multiple calls for comment from HuffPost.

Goldia Coldon said detectives told her they have no clues or leads to follow.

"The police are not actively looking for Phoenix," Coldon said. "They let me know when they find a body or something. They let me know it's not Phoenix, but other than that we don't really hear from them."