The Special Investigations Unit (S.I.U.) is responsible for all narcotics and vice investigations within the City of Griffin. The unit is comprised of Lt. John Hayes (S.A.C.), Sgt. Colt Tolen (A.S.A.C.), S/A Dexter McCune, S/A Josh Oxford and S/A Michael Betsill. This unit investigates and prosecutes illegal drug activity within the City of Griffin. This unit also works with other surrounding narcotics units, state agencies, and federal authorities. They are also called upon to investigate gang activity, prostitution, gambling, and illegal alcohol sales.