The Criminal Investigations Section is led by a sergeant and staffed with both general assignment and specialized detectives.  These detectives are responsible for investigating all crimes that occur within the Town of Herndon.  General assignment detectives work normal business hours Monday through Friday.  A detective is always on call outside normal business hours and is available to assist patrol officers when needed.

The Department participates in regional task forces to enhance investigative resources by assigning detectives to the Fairfax County Police Organized Crime Unit, the Northern Virginia Regional Gang Task Force, and the Internet Crimes Against Children Task Force (ICAC).