Riley Cade Sexton, 18, of Smithville was arrested Sunday for domestic assault after allegedly hitting his mother with a microphone stand at her residence on McMinnville Highway. According to DeKalb County Sheriff Patrick Ray, on Sunday, Feb. 11, a DeKalb County Sheriff’s deputy responded to McMinnville Hwy. for a report of a domestic between a mother and son. Upon arrival the deputy spoke to the mother who stated that her son, Sexton, got into an argument and allegedly hit her with a microphone stand.