Sheriff's Command Staff

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Captain Mike Ashmun

Captain Mike Ashmun has over 25 years of experience in law enforcement and has been with the Shasta County Sheriff’s Office since 1984. Mike has worked in the Custody Division as a Deputy and Sergeant, and is currently the Jail’s Facility Manager. Previous assignments include Patrol Deputy, Patrol Sergeant, and Marijuana Team Member. He has held numerous collateral assignments in training, tactical, and operations. In 2006, he was promoted to Patrol Operations Lieutenant. Mike has an Associate of Arts degree in Administration of Justice and is a 2000 graduate of Sherman Block Supervisory Leadership Institute.

 Lieutenant Lieutenant Forrest Bartell

Lieutenant Forrest Bartell began his career with the Shasta County Sheriff’s Office in 1988 as a Reserve and worked as in the Boating Safety Unit before becoming a full-time Deputy at the Jail in 1990. He transferred to Patrol in Burney in 1992 and has held collateral assignments as Range Instructor, Dare Instructor, COPPS Officer, Coroner, K-9 Handler, and liaison with the Women’s Refuge Domestic Violence Program. In 2000 Forrest was promoted to Sergeant assigned to the Jail and later transferred back to Burney as Patrol Sergeant. He is the K-9 Coordinator, Chief Range Master, Training Cadre Coordinator, and has been the Patrol Lieutenant in Burney since 2007.

Captain Jerry Shearman

Lieutenant Jerry Shearman has been in law enforcement for over 28 years, having served five years with the South Gate Police Department and four years with the Anaheim Police Department before beginning his career at the Shasta County Sheriff’s Office in 1994. He worked through the ranks of Deputy, Detective, Sergeant, and Lieutenant before being promoted to Captain in 2008. Jerry has been on the SWAT team for 13 years, holding positions as Team Commander and Chief Range Master, and spent over two years as Commander of the Sheriff’s Office Emergency Services Unit. As Captain, he is currently assigned as the Division Commander for the City of Shasta Lake. Jerry attended the FBI National Academy in Quantico, Virginia.

Captain Don Van Buskirk

Captain Van Buskirk has over 30 years of law enforcement experience, having begun his career with the Redondo Beach Police Department in January 1974. Since August 1982, he has served with the Shasta County Sheriff’s Office. Don spent two years as a Patrol Sergeant and began his assignment in the Custody Division’s new jail in 1986, supervising and managing the Main Jail, Detention Annex/Work Release, and Crystal Creek. Captain Van Buskirk possesses an Associate Arts Degree in Police Science.

Lieutenant Sheila Ashmun

Lieutenant Sheila Ashmun has been employed by the Shasta County Sheriff’s Office for 18 years. She began her career in 1990 as a Deputy in the Custody Division with duties that included Classification Officer, Training Officer, and Watch Commander. Sheila rotated to the Patrol Division as a Deputy in 1997 and worked there until 2000 when she moved to Major Crimes as a Detective. In 2003, she promoted to Sergeant and worked in the Custody Division as a Shift Sergeant and Administrative Sergeant. In 2004, she rotated to the Patrol Division as a Shift Sergeant. In 2006, she rotated to the Services Division and took over the Civil Unit as a Supervisor. In 2007, Sheila was promoted to Lieutenant assigned to the Custody Division.

Captain Dave Compomizzo

Captain Dave Compomizzo has worked for the Shasta County Sheriff's Office for 28 years, and began his career as a part-time Boating Safety Officer. Prior assignments include Custody, Crystal Creek, Patrol, Investigations, and the Sheriff’s Property and ID Unit. Additional collateral duties have included Hostage Negotiations, Field Training Officer, Range Master, Narcotics K-9 Handler, Search & Rescue, and Rescue Diver. Dave is currently the Captain of the Investigations Division. He oversees operations for the Major Crimes Unit, Evidence Lab, California Multi-Jurisdictional Methamphetamine Enforcement Team (CAL-MMET), Marijuana Enforcement Team (MET), and Shasta Interagency Narcotics Task Force (SINTF).

Lieutenant Jeff Foster

Lieutenant Foster has served with the Shasta County Sheriff Office since 1991. He has worked in Patrol, Custody, Boating Safety Unit, and Investigations. Jeff is currently an Investigations Lieutenant overseeing the California Multi-Jurisdictional Methamphetamine Enforcement Team (CAL-MMET), the Marijuana Enforcement Team (MET), and is the liaison with the Shasta Interagency Narcotics Task Force (SINTF). Jeff is a graduate of the Supervisor Leadership Institute (SLI) and has been honored as Deputy of the Year and Sergeant of the Year.

Lieutenant Mark Lillibridge

Lieutenant Mark A. Lillibridge has been with the Sheriff’s Office since 1991. He began his Law Enforcement career in 1988 as a Police Officer for the City of Los Angeles after serving as a Military Policeman in the United States Army. Mark has worked in many Sheriff’s Office Units. With the Custody Division, he was Deputy, Jail Training Officer, Shift Supervisor, and Administrative Sergeant. In the Patrol Division, he served as Lakehead Resident Deputy, D.A.R.E. Instructor, and Supervisor of the Youth Services Unit. In the Boating Safety Unit of the Services Division, he was Lake Patrol Deputy, Watch Commander, Search and Rescue Coordinator, Dive Team Leader, and Sergeant. In the City of Shasta Lake Division, Mark was Patrol Deputy, Field Training Officer, D.A.R.E. Instructor, Traffic Enforcement Officer, and Patrol Sergeant. Lillibridge was promoted to Lieutenant in 2009 and is the Chief Deputy Coroner for the Shasta County Sheriff’s Office.

Captain David Dean

Captain Dave Dean began his career with the Shasta County Sheriff’s Office in 1980. His previous assignments have included Search and Rescue Coordinator and Dive Team Leader. Dave is currently Captain of the Services Division, overseeing 9 Search & Rescue teams, comprised of 260 volunteers, and a 14 person Overhead Team. Dave’s responsibilities include emergency planning, disaster preparedness, training, disaster response, and coordination of Search & Rescue, Dive Team, Explosives Unit, Boating Safety Unit, Homeland Security, Records, Hostage Negotiations, SWAT, and Personnel.

Lieutenant Anthony Bertain

Lieutenant Anthony Bertain has been in law enforcement for 17 years. He began his career in 1991 with the Trinity County Sheriff’s Office and was hired by the Shasta County Sheriff’s Office in 1999, assigned to the Burney Station as a Deputy. In 2001, he was assigned as a Detective for Major Crimes and continued to work out of the Burney Station. While investigating major crimes, he handled sex crimes investigations, homicides, and other crimes against people. In 2004, he went back to Patrol and was promoted to Sergeant in 2006. Anthony has been a member of the SWAT Team since 2001 and is currently the SWAT Team Leader. In June 2008, he was promoted to Lieutenant and assigned to the Office of Emergency Services.