Chapel Hill, N.C. — A former Chapel Hill teacher arrested last summer on child-sex charges now faces federal charges involving pornography.

David Campbell Jones, 47, of 113 Hampton Court in Chapel Hill, was indicted by a federal grand jury in Greensboro on charges of child pornography and trying to engage in sexual activity with a minor, according to court documents.

Jones planned to turn himself in to federal authorities this week, said his attorney, Syd Alexander. Jones has cooperated with authorities since he was released from jail on $510,000 bond, Alexander said.

Jones resigned as a science teacher and football coach at Guy B. Phillips Middle School in August after he was arrested on charges of solicitation of a child by computer to commit an unlawful sex act. He also has been charged with 20 counts of second-degree sexual exploitation of a minor.

Police said Jones attempted to meet up with a 15-year-old boy after soliciting the teen online. When he was arrested, Jones was carrying condoms, personal lubricant and a digital camera, according to a search warrant.

Investigators seized several computers after Jones was arrested and found thousands of videos and photos of young children engaged in sex acts.