"I don't have a clue what happened," Langhorne said Thursday night.
Langhorne said the mother of her son's girlfriend called Tuesday to tell her detectives had been showing a picture of Marquis to people in the neighborhood to help identify the boy. Langhorne called the medical examiner's office and then police headquarters, where she positively identified her son based on a cell phone picture.
"I glanced at it briefly," Langhorne said. "I didn't really want to see."
Now, Langhorne said she's hoping someone will come forward with information about what happened to her son. So far, investigators have not named any suspects in the case.
Funeral arrangements for Overstreet have not yet been completed.