Yarmouth Police Department, Massachusetts
End of Watch Thursday, April 12, 2018
Add to My HeroesSean McNamee Gannon
Sergeant Sean Gannon was shot and killed while assisting with a warrant service at 109 Blueberry Lane, in Barnstable.
Sgt. Gannon and his canine partner, Nero, were searching the home and located the wanted man in a closet. The man opened fire, fatally wounding Sgt. Gannon and wounding Nero. The man then barricaded himself inside the house for two hours before being taken into custody.
The 29-year-old subject was charged with Sgt. Gannon's murder. His record showed he had 111 prior offenses and was on probation. In August 2021 the man was convicted of second-degree murder, assault and battery with a dangerous weapon, possession of a firearm without a license, and interfering with a police canine.
Sergeant Gannon had served with the Yarmouth Police Department for 7-1/2 years and previously served with the Stonehill College Police Department and Nantucket Police Department. He is survived by his wife, parents, brother, and sister.
Sgt. Gannon was posthumously promoted to the rank of sergeant with the Yarmouth Police Department a week after his death.
Bio
- Age 32
- Tour 7 years, 9 months
- Badge 5992
Incident Details
- Cause Gunfire
- Weapon Gun; Unknown type
- Offender Convicted of murder
Most Recent Reflection
View all 282 ReflectionsSgt. Was ambushed in an addict while looking for a suspect. He was shot and killed. He was a great Police K-9 officer that made the ultimate sacrifice for our Commonwealth of Massachusetts and this nation. Thank you for your service to all you encountered on patrol and in your Community. They have lost a real hero. Praying for your loved ones during this anniversary.
Chief Chaplain: Rev. Sandro Anaya
Universal life Church/ Revere Police Watch Ministry
April 13, 2025
