The Special Investigations Unit (SIU) is the proactive investigation and enforcement arm of the Division of Police. SIU is responsible for investigating narcotics, prostitution and gambling offenses as well as fugitive apprehension, surveillance operations and search warrant executions. SIU also investigates serial or pattern crimes that affect the quality of life of Hilliard and Norwich Township residents. SIU is part of the Bureau of Investigation and works closely with the Criminal Investigation Unit (CIU) and the Patrol Division. It is supervised by a sergeant and staffed by detectives as well as specially trained narcotics and K-9 tracking teams.