A volunteer school aide accused of sexually abusing students at a suburban Washington elementary school has now been indicted and faces additional charges.

Twenty-two-year-old Deonte Carraway was charged last week with eight counts of producing child pornography. A grand jury indicted him Monday on 13 counts, involving 11 victims ranging in age from 9 to 12.

If convicted, Carraway could spend the rest of his life in prison. Each count carries a minimum 15-year sentence. He is also facing charges in state court. His attorney has declined to comment.

Parents of some of the children have alleged in lawsuits that Carraway was given unrestricted access to students at Judge Sylvania Woods Elementary School in Glenarden, Maryland. The lawsuits say the principal was warned about Carraway's conduct but didn't inform authorities.