PIERRE, S.D. (AP) — A Cherry Creek man has pleaded not guilty to sexually abusing a girl on the Cheyenne River Sioux Reservation.

The U.S. attorney's office says 32-year-old Keeler Condon is accused of engaging in a sex act with a female juvenile who was incapable of understanding what was going on or declining to participate.

Condon is scheduled for trial Sept.18. He could face life in prison if convicted.