Investigators have found human remains inside the car of a woman who disappeared in Arkansas 23 years ago with her child.

Adventures With Purpose, a charity that works to solve cold cases around the nation, found Samantha Jean Hopper’s car in eight feet of water on Tuesday, according to a statement from the Pope County Sheriff’s Office.

The missing report for Hopper was filed on September 11, 1998.

Samantha, her daughter, and her blue Ford Tempo were never found, according to the statement. Samantha was reportedly on her way to drop off her daughter Courtney Holt before going on to a performance in Little Rock.