Editor's note: Because of ongoing computer system problems at the Bulloch County Sheriff's Office, the mug shots of the suspects were not available Tuesday.Local law enforcement officers have arrested 29 people so far as part of a joint investigation into drug trafficking that began in September. A joint effort between city and county law enforcement netted 29 arrests by Tuesday morning, and more arrests are expected. Drug agents seized large quantities of cocaine, marijuana and Ecstasy was well as cash and an assortment of guns.