The Bureau conducts follow-up investigations into cases submitted to the District Attorney by local law enforcement agencies. The types of cases vary from serious felonies, homicide, sexual assault, gang cases, narcotics, arson, and other major cases. District Attorney Investigators also assist other law enforcement agencies where investigative assistance, or specific expertise may be desired.  

The Bureau also assumes original jurisdiction and is the primary investigative agency in a wide variety of economic crime cases including real estate fraud, major fraud, consumer fraud, elder financial fraud, worker’s compensation fraud, health/long-term disability fraud and auto fraud.  

Additionally, the Bureau is the primary investigative agency for parental child abductions, Election Code violations, crimes committed by public officials, Fair Political Practices Act violations, Corporation Code violations, and environmental health violations. Investigators assist prosecutors in trial by developing leads and locating additional witnesses, uncooperative or reluctant witnesses, ensuring the safety of victims and witnesses, and engaging in trial strategy with their prosecutor partners.