Investigations Division

The Sheriff's Office Investigations Division provides thorough and effective investigative and specialized services to the public and San Mateo County criminal justice agencies to ensure safer communities and provide the foundation for investigation and successful prosecution of criminals while promoting countywide and area-wide collaborative partnerships.

Major Crimes Unit

This unit is responsible for all investigations concerning homicides, officer-involved shootings/deaths, major assaults, robbery, kidnap, and other similar crimes against persons not handled by any other unit. The Unit is also responsible for investigation of domestic violence and juvenile cases.

The main functions of the Domestic Violence Firearms Compliance Unit are to conduct investigations of domestic violence cases and to ensure the safe and timely surrender of firearms for safekeeping as required by Family Court Orders or by civil agreement.

General Crimes/SHOP/Sex Crimes/Court Services

The General Crimes Unit is responsible for all investigations concerning burglary, theft, arson, fraud, auto theft, and other similar crimes against property not handled by any other unit.

The SHOP/Sex Crimes Unit handles all crimes involving pornography, prostitution, vice, rape, molestation, and child physical/sexual abuse and the registration of sex offenders.

The Court Services Unit is responsible for the filings of all cases with the District Attorney’s Office and the investigation of all felony fugitive extraditions, and it acts as a liaison with outside agencies.

The Juvenile Detectives Unit conducts investigations of most matters regarding juveniles, as well as missing persons, COS cases, and the Auto Desk.

S.F.I.A./North County Investigations Unit

This Unit is responsible for investigation of all crimes reported at the San Francisco International Airport and in the northern portion of the county. These reported crimes may be crimes against persons and/or property.

Countywide Building Security

The Countywide Security Unit provides a safe working environment for county employees through training and site visits. The Unit maintains regularly scheduled presentations, such as Workplace Violence Prevention Policy Training, New County Employee Orientation, and Personal Safety Training. The Unit provides security surveys and assessments of all county facilities and helps design and maintain county alarm systems, video monitoring systems, and card key access. The Unit also provides security for special county events.

Countywide Narcotics Task Force (CNTF)

The SMCNTF was established in 1984 and is recognized by the California Government Code as a public entity. It obtains its authority by virtue of a Joint Powers Agreement between the County of San Mateo and the incorporated cities within the county. The official mission of the San Mateo County Narcotics Task Force (SMCNTF) is to stop the flow of illegal drugs coming into San Mateo County by identifying and arresting drug traffickers, dismantling illegal drug organizations, and providing drug related training to local enforcement officers and members of the community.

Vehicle Theft Task Force (VTTF)

The San Mateo County Vehicle Theft Task Force (VTTF) was established in 1994 by the County Board of Supervisors. The VTTF conducts investigations through a countywide coordinated effort to target specific vehicle theft crimes. It also conducts related business inspections; investigates organized auto theft activities; and provides specific training to local law enforcement agencies.

Gang Task Force (GTF)

The Countywide Gang Task Force was established in August 2005 by mutual agreement between the membership of the San Mateo County Police Chiefs and Sheriffs’ Association. The Gang Task Force is comprised of personnel from each law enforcement agency in San Mateo County, the Probation Department, and the District Attorney's Office, and it utilizes state and federal resources, as well. Their mission is to take a pro-active approach to the increased presence of gang activity and related violence in San Mateo County through intelligence driven enforcement operations in order to improve the safety and quality of life in our community.

Cargo Theft Task Force

The San Mateo County Cargo Theft Task Force (AIRCATS) was created by several cooperating law enforcement agencies in response to the increasing number of thefts being reported of cargo-in-transit, particularly high tech goods and computer components. AIRCATS is staffed by investigators from the San Francisco Police Department's Airport Bureau, the San Mateo County Sheriff's Office, and the Federal Bureau of Investigation.

AIRCATS's objective is to detect, arrest, and prosecute those persons  who commit such thefts and to prevent, interfere with, and disrupt the unlawful traffic in stolen cargo. To reach this goal, AIRCATS relies on cooperative relationships with freight brokers and freight forwarders operating to and from the San Francisco International Airport. AIRCATS works closely with other regional law enforcement task forces also engaged in abating the theft of both high tech and other cargo.

Sheriff's Office Missing Persons

Law enforcement agencies in California do not require a person to wait a specific period of time before reporting a person as missing. If you have information about a missing person or want to file a report in regards to a missing person please contact the San Mateo County Sheriff’s Office at 650-363-4000 (24-hours a day). If you believe a missing person is in danger, please call 9-1-1 immediately. Missing Persons Unit Detectives at 650-363-4050. If you have information, but wish to remain anonymous, please call toll free 1-800-547-2700.

Sheriff's Office Missing Persons Descriptions

If you have information about a missing person or want to file a report in regards to a missing person please contact the San Mateo County Sheriff’s Office at 650-363-4000 (24-hours a day).