The Northwood Police Department's Detective Bureau is responsible for investigating cases that are extensive or require specialized investigative techniques.  The bureau is staffed by investigators that are specially trained in gathering and assessing crime-related information, interviewing crime suspects and witnesses, and the processing of crime scenes for the purpose of identifying, collecting and preserving a variety of forms of evidence.

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The Detective Bureau investigates a variety of areas, including crimes against children, sexual offenses, death investigation, surveillance, and financial crimes.

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The Northwood Police Department's Detective Bureau works closely with many different outside agencies, such as Wood County Job and Family Services, Ohio Investigative Unit, Ohio Bureau of Criminal Investigation, Ohio State Highway Patrol, and more.