State police continue to investigate but say there is no known motive for the shooting.
Adkins was being lodged in the Shelby County Detention Center. Albert Marcus Waller, of Plant City, Fla., was pronounced dead on arrival at Carroll County Memorial Hospital on Friday after his motorcycle struck another bike as the two crested a hill at an off-road motorcycle event in Trimble County, state police said. Trooper Matt Carter said the child was attending the Observed Trials at Saddleback East with his family. The child was riding on a trail and was not a participant in the event, Carter said. The rider of the other motorcycle, whom police did not identify, was not injured.