A member of the rap group Migos, jailed without bond after an April 18 arrest at a Georgia Southern University concert, racked up more charges Saturday after a fight behind bars. Kiari Kendrell Cephus of Lawrenceville, known by the stage name "Offset," was charged with battery and causing a riot in a penal institution after a fight in the Bulloch County Jail with another inmate Saturday, according to reports from the Bulloch County Sheriff's Office. Bulloch County Sheriff's Inv.