Investigations Division

The Investigation Division investigates serious crimes occurring in the unincorporated areas of Marin County. The division also provides technical and manpower assistance for major crimes to the city police departments when requested. This Division is divided into adult investigations, juvenile investigations and the Scientific Investigations Section and is overseen by Lieutenant Jamie Scardina.

The Adult Unit investigates crimes against persons and property crimes. The Juvenile Unit investigates crimes committed by juveniles, child abuse cases, sexual assaults, and works with civic groups handling delinquency and truancy problems. The Juvenile Unit also oversees the School Resource Officers Program. The Scientific Investigations Section has specialists in crime scene investigation and forensics.

The Sheriff’s Office Investigations Division also oversees a Cold Case Team.  The Cold Case Team was established in 2012 to focus investigative efforts on unsolved homicides.  The team is currently staffed on a volunteer basis by three retired former prosecutors from the Marin County District Attorney’s Office.  During their methodical review of each case, the information is organized and examined for new avenues of investigation, including the latest advances in the field of forensic science.  The Cold Case Team routinely reviews investigative lead and intelligence for possible connection to homicides.  During their first year with the Sheriff’s Office, the Cold Case Team helped the District Attorney’s Office with the pretrial preparation and jury trail of serial killer Joseph Naso.


Adult Crime Unit

Adult Crimes

The Adult Section of the Sheriff's Office Investigations Division consists of 1 sergeant and 3 detectives.  Heading up the section is Sergeant Jesse Klinge. The Adult Crimes Unit  is responsible for investigating all serious crimes to include homicide, robbery, property crimes, and crimes against persons.

Three detectives, Detective Shawn Baker, Detective George Bernheim , and Detective Sean Maykel , are assigned to this unit.  Detectives provide a coordinated response to the various crimes scenes that are encountered throughout the county.  Detectives complete both preliminary and follow-up investigations.  Detectives also conduct research to establish common links between crimes and seek to identify / arrest each offender.  Detectives in the unit have receives extensive training related to death investigations, search and seizure, search warrants, evidence collection, and preservation, interviewing, intelligence gathering and the legal process.

Juvenile Unit

Juvenile Unit

The Juvenile Unit is comprised of two child abuse/sexual assault detectives, one School Resource Officer, and one Sergeant. The Unit is responsible for investigating juvenile delinquency, child abuse, sexual assault, and vice crimes. Sergeant Chris Berry  and Detective Laurie Dargo and Detective Lauren Patton  have received numerous hours of specialized training to address all manner of crimes committed against children.

The Sheriff’s Office is committed to the multi-disciplinary approach when investigating cases of sexual exploitation of children. Detectives from this unit work closely with the District Attorney, Child Protective Services, the Jeannette Prandi Children’s Center and other treatment providers. The School Resource Officer, Deputy Josie Sanguinetti is responsible for addressing concerns and referrals involving juveniles in Marin County Schools. This unit also administers the Juvenile Diversion Program and coordinates the School/Law Enforcement Partnership with the Marin County Office of Education.

The Marin County Sheriff’s Office is a member of the Region II Regional SAFE Task Force. SAFE stands for Sexual Assault Felony Enforcement. This task force is a cooperative arrangement with 11 other Bay Area counties. The primary objective of the Region II Regional SAFE Task Force is to reduce the rate of non-compliance among registered sex offenders and provide educational programs to the community as they relate to registered sex offenders. This task force works together to investigate and monitor registered sex offenders, conduct compliance checks and surveillance, and seeks to ultimately protect the community. 


Crime Scene Investigation

Csi Detective

The Crime Scene Investigation (CSI) unit is headed by Detective Heather Rock and Detective Ed Rudolph.  The CSI unit is responsible for, but are not limited to, photographing, analyzing, collecting evidence, reconstructing major crime scenes, assisting deputies and other agencies with crime scene processing, analyzing fingerprints and operating the CAL-ID computer which searches the State’s fingerprint database. In addition to CAL-ID, the unit also operates a County wide AFIS system for searching latent fingerprints.

The CSI unit also runs a latent fingerprint laboratory where evidence collected at crime scenes is processed for latent prints. Processing includes, but is not limited to cyanoacrylate (superglue) fuming, black powder and magnetic powder processing, ninhydrin processing and the use of A.L.S. and fluorescent powders.
The CSI unit has a crime scene van that carries most equipment needed for on-scene processing. The van is equipped with a portable gas generator for power in remote areas.

Property Unit


The Marin County Sheriff’s Office maintains the evidence and property submitted by our Deputies and Detectives. This includes, but is not limited to, items of evidence in criminal matters, evidence seized in narcotic violations, found property and firearms that are turned over to us to be destroyed.

The person in charge of our property/evidence storage is Ann-Marie Lelek. Ann-Marie started as in intern in 2001 and was hired on with the Sheriff’s Office since 2002. Ann-Marie is in charge of receiving the property and evidence; maintaining the files and records regarding the storage, movement and disposition of property in her custody; releasing evidence to the courts for trials; testifying in court as to the chain of custody of evidence; releasing property to its rightful owner; making sure property is properly destroyed when the disposition requires; arranging for the sale of unclaimed property to the public through an authorized auction house and the safe handling and destruction of bio-hazard materials.

If you need to claim property that has been taken as evidence and there has been a final disposition in the court case or you want to claim found property in our custody, please call 415-473-6820 and make an appointment with Ann-Marie. Please do not just stop by. Making an appointment assures that someone will be here to assist you.

Probation Enforcement


C.O.P.E. stands for Coordination of Probation Enforcement. The main focus of the unit is to monitor high risk narcotic violators who have been placed on probation rather than serving time in custody. The goal of the C.O.P.E. unit is to ensure that those individuals who have been granted the privilege of probation are leading law abiding lives rather than reverting back to their criminal ways. The unit carries out its goal by conducting unannounced probation searches on those probationers who have waived their 4th amendment right to search and seizure. The unit also conducts investigations into street level narcotics dealers and assists the Major Crime Task Force with their narcotic investigations. 

The C.O.P.E. unit was started in 1990 and originally staffed with a Sergeant and a Deputy from the Sheriff’s Office and a Marin County Probation Officer. The unit today is currently staffed by a Sheriff’s Sergeant, a Sheriff’s Deputy, a Novato Police Officer, and a Marin County Probation Officer.

The C.O.P.E. unit has countywide jurisdiction. They work with all of the agencies within Marin County and often receive information from the various police departments regarding probationers who require special attention.