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. Karen Yancy (S.A.C.), Sgt. Colt Tolen (A.S.A.C.), S/A Travis Wick, S/A Dexter McCune, and S/A Jason McKinney. 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.