The Detective Office investigates criminal cases that fall within the jurisdiction of the Niagara Regional Police Service.  They are a specialized unit of highly qualified individuals who conduct investigations, arrest offenders, and prepare cases that deal with criminal offences, missing persons, sudden deaths, and a variety of other crimes.

To better suit the needs of communities in the Niagara Region, each District has its own Detective Office.  This allows detectives to investigate crimes occurring within their individual areas, while working with other units of the Niagara Regional Police Service and detectives in other Districts.  In addition, members of the Detective Office also liase with other police agencies, Crown Attorney's Office, Court Officials, members of the Legal Profession, Coroner's Office, and a number of community groups in relation to their investigations.  At times, members of the Detective Office work on extended investigative projects and Joint Force Investigations with such law enforcement agencies as the O.P.P. and R.C.M.P.

Specialized units and assignments within the Detective Office include: