Investigations Divisioninvestigations vehicle

The Investigations Division of the Merrimack County Sheriff’s Office is headed by Detective Sergeant Mario Messina. The Investigations Division is tasked with assisting the 27 towns and cities that make up the Merrimack County with full investigative resources to include:

The Investigations Division of the Merrimack County Sheriff’s Office also provides the following services:

All Investigations Division detectives work very closely with outside agencies such as the Children’s Advocacy Center, Children & Family Services, Internet Crimes against Children (ICAC), New Hampshire State Police, Department of Homeland Security (HSI), Fire Marshal, Merrimack County Attorney’s Office and other local, state and national law enforcement agencies.

For information or assistance please call 603-796-6621.


polygraph unit - Merrimack County SheriffMCSO Polygraph Unit

Created in 2016, The Merrimack County Sheriff’s Office Unit offers Forensic Polygraph Examinations to support law enforcement in all applicable aspects. The Polygraph Unit is headed by an expertly trained, certified professional Forensic Polygraph Examiner. Polygraph Examinations are utilized daily as a tool for criminal investigations, internal investigations and employment purposes. The Merrimack County Sheriff’s Office provides this resource to all agencies located within the county and throughout the state.

For more information on the polygraph unit please contact 603-796-6627 or



The Communications division is a 24/7 operation handling the emergency calls for the Sheriff’s Office as well as Allenstown, Boscawen, Bow, Bradford, Canterbury, Chichester, Epsom, Henniker, Hopkinton, Loudon, Pembroke, Pittsfield, Warner,  and Webster. In addition, the Medical Examiner and County Attorney’s office is on call through our office. For emergencies dial 911.  If you have a non-emergency call and would like to speak to the department directly they can be reached at the number below.

communications badgeAllenstown: (603) 485-9500
Boscawen: (603) 753-9124
Bow: (603) 228-1240
Bradford: (603) 938-2522
Canterbury: (603) 783-0433 X 0
Chichester: (603) 798-4911
Epsom: (603) 736-9624
Henniker: (603) 428-3213
Hopkinton: (603) 746-5151 X 0
Loudon: (603) 798-5521
Pembroke: (603) 485-9173
Pittsfield: (603) 435-7535
Warner: (603) 456-3433
Webster: (603) 648-2200