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(CNN)-- A man accused of killing his mother and stepfather then dumping their bodies in a basement is on the run after escaping from a South Carolina mental health facility.

Jason Mark Carter, 39, was committed after he was found incompetent to stand trial in the killings eight years ago.

Details on his Thursday escape were sketchy, but CNN affiliate WISTV reported thathe worked at a supply office on the hospital campus.

He may be traveling in a stolen 1991 White Chevy van, the Oconee County Sheriff's Officesaid in a statement.

In March 2006, deputies went for a welfare check at a home in Seneca and found the bodies of Kevin and Debra Ann Perkins in a room in the basement, the Sheriff's Office said.

Carter was in the room with the victims, who were wrapped in plastic bags, according to officials.

During his trial, his attorney said Carter had no recollection of the crime,the affiliate said.

It's unclear whether he left the facility with his medication.

Authorities urged the public to report any sightings of Carter and approach him with "extreme caution."

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