Command Staff
Chief Timothy McLin
Chief of Police
Relevant Work Experience:
Hired as Part-Time Officer, January 1991
Hired as Full-Time Patrolman, September 1991
Promoted to Detective/Juvenile Officer, 1998
Promoted to Patrol Sergeant, 2000
Promoted to Patrol Lieutenant, 2005
Promoted to Captain of Investigations in 2016
Appointed Chief of Police, March 2022
Professional Certifications/Affiliations:
Graduated from the 99th NH Police Academy, 1993
Graduate of Babson College Command Training Institute
Graduate of Leadership Institute
Advanced training in Sexual Assault Investigations, Child Abuse Investigations, Homicide Investigations
Service and Accomplishments:
Served in US Navy from 1984-1990
Captain Matthew Duval
Patrol Division Commander
Relevant Work Experience:
Hired as Full-Time Patrolman, March 1998
Promoted to Patrol Sergeant, 2001
Promoted to Patrol Lieutenant, 2017
Promoted to Captain/Patrol Division Commander, 2022
Professional Certifications/Affiliations:
Graduate from the 115th NH Police Academy, 1998
Graduated from Command Training Program, 2002
Graduate from Traffic Crash Reconstruction, Institute of Police Technology and Management, 2015
Member of the Strafford County Regional Traffic Accident Reconstruction Team
BS in Criminal Justice from Franklin Pierce University
Justice of the Peace
Service and Accomplishments:
Served in the USMC from 1991-1995
Captain John Sunderland 
Investigation Division Commander
Contact Captain John Sunderland
Relative Work Experience:
Deputy Sheriff - Liberty County Georgia 2006-2008
Hired as Full-time Patrolman March 2009
Promoted to Detective/Juvenile Officer/Prosecutor 2011
Promoted to Detective Sergeant 2013
Promoted to Captain/Investigations Division
Professional Certifications/Affiliations:
Georgia POST Certification 2003
Associates Degree in Criminal Justice 2008
Law Package 150th NH Police Academy 2009
Cellebrite Operator/Analysis 2016
Reid Interview/Interrogation 2018
ATF Special Deputy 2020
FBI LEEDA - Supervisor Leadership Institute 2021
Service and Accomplishments:
Served in the United States Army from 1997-2003
Lieutenant Gary O'Brien
Lieutenant Patrol Division/Parking/Dispatch
Relevant Work Experience:
Hired as Full-Time Patrolman, September 2007
Promoted to Sergeant, 2017
Promoted to Lieutenant, 2022
Professional Certifications/Affiliations:
Graduated from the 137th NH Police Academy 2005
Use of Force/Firearms instructor 2008
Forensic and Crime Scene Investigation Academy 2018
Alcohol Tobacco and Firearms National Integrated Ballistic Information Network (NIBIN) 2018
FBI LEEDA Academy 2021
Justice of the Peace