All major felony investigations are handled by the personnel in this division. While conducting these investigations, the men and women of this unit are often involved in cooperative efforts with other county, state, and federal organizations. In addition, they work closely with the San Joaquin District Attorney's office to obtain and secure criminal complaints and convictions. All crimes committed against children are investigated within this division, as well as the operation of the School Resource Officer Program. This division is also enhanced in evidence and property collection, preservation, and tracking by two full-time Crime Scene Technicians. Other responsibilities of the general Investigations Bureau include:

• Tracking Criminal trends and events
• Prevention of future crimes
• Conducting follow-up investigations
• Participating in cooperative, proactive law enforcement in identified problem areas
• Missing persons investigations

Also under the General Investigation Division is the Street Crimes Unit or SCU.  These officers and staff are responsible for gathering intelligence, narcotics investigations and gang suppression and investigation.