Command Staff

Chief Leal  Chief James Leal began his career in law enforcement in 1983 with the Alameda County Sheriff’s Department.  He was hired as a Cadet Captain then worked as a Reserve Deputy Sheriff Sergeant.  He moved on to the San Mateo County Sheriff’s Office as a Deputy Sheriff in 1987.  Chief Leal was hired by the Newark Police Department as a Police Officer on January 1, 1988.  He was a member of the Special Enforcement Unit and served as a Motor Officer, Property Crimes Detective, Field Training Officer, SWAT Team Leader, and Sniper.  He was named Officer of the Year in 1995. 

Chief Leal was promoted to Sergeant in 2001.  He worked as a Patrol Sergeant as well as the Community Services Sergeant responsible for Traffic and Code Enforcement.  He served as Operations, Support Services, and Administrative Services manager as a Lieutenant and Captain from 2004-2008.


Chief Leal was appointed to the position of Police Chief on August 1, 2008.  He is the eighth Police Chief since the City's incorporation in 1955.

Chief Leal earned his Associate of Arts degree in Administration of Justice from Chabot Community College in 1985. He earned his Bachelor of Arts degree in Business Management from St. Mary’s College in 2003, as well as his Masters Degree in Public Leadership in 2006. He has been an Administration of Justice Instructor at both Ohlone and Chabot Community Colleges. He is a graduate of the California Commission on Peace Officer Standards and Training Command College and the Senior Management Institute for Policing in Boston


Chief Leal is a member of the International Association of Chiefs of Police and the California Police Chiefs Association (CPCA).  He currently serves on the Law and Legislation Committee and as the Chair of the CPCA statewide traffic safety committee.  He is also on the Board of Directors for the CPCA.  Chief Leal is a member of the Newark Rotary Club and has served as the Director of International Services as well as President.

Chief Leal can be contacted at or (510) 578-4725.


Commander Carroll  Commander Mike Carroll has been a Police Officer for the City of Newark since April of 1991. He has a Bachelor of Science degree from California State University, Hayward.

Commander Carroll is currently assigned Administrative Commander. His past specialized assignments include: Detective Supervisor, Canine Supervisor, Field Training Officer, School Resource Officer, Trauma Support Team Member, Hostage Negotiator, and Explorer Advisor. He was the Police Department's first gang detective when he was selected to join the Southern Alameda County Gang Suppression Task Force.  Commander Carroll was selected as NPD Officer of the Year in 2004 and California Junior Chamber of Commerce Outstanding Young Public Safety Officer in California in 1998.

Commander Carroll is married and has three children. In his free time, he coaches a local soccer team and enjoys spending time with his family.

Commander Carroll can be contacted at or (510) 578-4220.


  Captain Jonathan Arguello

Captain Jonathan Arguello can be contacted at or (510) 578-4375.


  Captain Chomnan Loth was hired as a Police Officer for the City of Newark in 2002.  During his time as an officer, Captain Loth worked in Patrol and as a Detective with the Gang Violence Suppression Task Force and the Major Crimes Task Force.  During his time in the task force, Captain Loth specialized in gang enforcement and investigations.  Captain Loth is a court recognized expert in the area of gangs and has testified numerous times as an expert in Alameda and San Mateo County Superior Courts.  Captain Loth also worked as a Field Training Officer, Defensive Tactics Instructor, Chemical Agent Instructor, Acitve-Shooter Instructor, and as a member of the SWAT and Sniper teams.

Captain Loth was promoted to Police Sergeant in 2011, where he worked as a Patrol Sergeant, Support Services Sergeant, and Special Enforcement Team Sergeant.

Captain Loth was promoted to Lieutenant in 2014, where he served as the Operations Lieutenant overseeing Patrol, the K9 Program, Special Enforcement Team, Major Crimes Task Force, and SWAT.

Captain Loth has a diploma with honors and received a scholarship from Milpitas High School.  He has an Associate of Arts in Liberal Arts and an Associate of Science in Criminal Justice degrees from Ohlone College, a Bachelor of Science degree in Occupational Studies and Masters of Science degree in Emergency Services Adminisration (Summa Cum Laude) from California State University Long Beach. In 2014, Captain Loth earned his Doctor of Business Administration (Magna Cum Laude) degree from California Southern University.  Captain Loth is a member of The Honor Society of Phi Kappa Phi, which is the nation’s largest, oldest, and most selective collegiate honor society founded in 1889, where memberships are by invitation only from the President of the university's chapter. 

Captain Chomnan Loth can be contacted at or (510) 578-4946.

Lieutenant Jolie Macias

Lieutenant Jolie Macias can be contacted at or (510) 578-4921.

Lieutenant Vince Kimbrough

Lieutenant Vince Kimbrough can be contacted at or (510) 578-4981.