A volunteer coach at Loganville High School is facing criminal charges after state law enforcement officials say he asked underage boys to send him explicit photos.

Michael Brandon Clay, 25, was charged with six counts of sexual exploitation of children, Georgia Bureau of Investigation spokeswoman Sherry Lang said Sunday. He turned himself in to the Walton County Detention Center on Thursday. The jail confirmed Sunday he had posted bond and been released.

Clay was a “community coach” for Loganville High School’s boys basketball team when he allegedly used text messages and Facebook to ask boys to send him photos of their genitalia, Lang said.

“What he told them was it was for a quote ‘bet’ and they could get $20 if they sent their picture,” she said.

The GBI did not release information on the number of boys involved, or say whether any had responded to the solicitations.

The GBI took the case after receiving a request March 11 from the Loganville Police Department.

The Walton Tribune reported that Clay lives in Monroe.