Sheriff's deputy, 28, bragged in text messages to extremist group that he had beaten a black man and planned to charge black Georgians with felonies to keep them from voting, FBI affidavit reveals Cody Grigger, a former Marine and Wilkinson County sheriff's deputy, pleaded guilty to one count of possession of an unregistered firearm FBI agents investigating extremist group found cache of illegal firearms, including machine gun, in Grigger's home and patrol vehicle Federal probe uncovered group text with Griggers and several people calling themselves 'Shadow Moses' In text to the group, Grigger claimed to have beat up a black man, bragged about buying illegal guns, and talked about killing liberal politicians