Comprising over 120 sworn officers, the Investigations Bureau (IB) provides vital investigative and logistical support to Assistant State’s Attorneys. They assist in the preparation and presentation of cases, while also lending their expertise and technical resources to local law enforcement efforts. IB plays a crucial role in complementing and supplementing investigations conducted by other law enforcement agencies.
Working closely with prosecutors from the Criminal Prosecutions and Special Prosecutions Bureau, the investigators tackle specialized crimes that may not fall within the purview of other law enforcement agencies. These include official misconduct, public integrity, election fraud, child support, and complex financial crimes.
To effectively manage its responsibilities, the Investigations Bureau operates through three distinct commands: the Trial Support Command, the Special Operations Command, and the Administrative Services Command. The Trial Support Command encompasses multiple prosecutorial support squads at 26th Street and all five suburban district courts. Investigators in these squads are responsible for various crucial tasks, such as locating and serving process on victims and witnesses, conducting interviews, collecting DNA samples for crime laboratory comparison, transporting evidence, and providing protection and security for witnesses. They also assist prosecutors in preparing cases for trial by conducting supplemental investigations as needed.
One of the primary responsibilities of experienced investigators is engaging with reluctant and uncooperative witnesses, providing them with the necessary assistance and security to bolster their confidence in testifying in court. This support ensures their safety and presence during legal proceedings. Each year, our investigators undertake the important task of transporting thousands of victims, witnesses, and defendants to court, reaffirming the commitment to a fair and thorough justice system.