(CBS) — A $10,000 reward has been offered for information leading to the arrest of the person or people responsible for the disappearance of a 13-year-old girl who went missing 20 years ago from southwest suburban Bolingbrook.

On Jan. 31, 1996, Rachel Marie Melon disappeared from her bedroom after staying home sick from school with a sore throat, according to a statement from Crime Stoppers of Bolingbrook. She would have turned 34 years old Thursday.

Her stepfather told police she went to take a nap and was discovered missing by a younger sibling about an hour later, according to the statement.

Anyone with information is asked to contact Crime Stoppers at (630) 378-4772. Tips can also be submitted through the web to bolingbrookcrimestoppers.org or texted to BPD, plus the message, to 274637. Callers may remain anonymous.