Disclosure of Officers’ Names from the April 20, 2026 Officer-Involved Shooting Incident in Ashland, New Hampshire

Concord, NH - Attorney General John M. Formella announces the identity of the police officer who discharged his firearm during a shooting incident that occurred during a police motor vehicle stop on Monday, April 20, 2026, in Ashland, New Hampshire, in which Demitri Zimmer (age 24) was shot and killed.

The officer who discharged his firearm during the incident was Ashland Police Sergeant Nicholas Shannahan. Sergeant Shannahan has been a law enforcement officer for the Town of Ashland for approximately three years.

The officer who was shot and wounded at the beginning of the incident was Officer Mason Dalphonse. Officer Dalphonse has been a law enforcement officer for the Town of Ashland for approximately two years. Officer Dalphonse is at home and is continuing to heal from his wound.

The exact circumstances surrounding this incident remain under active investigation. No further updates are expected until the investigation is completed.