Sergeant Sean Gannon

On Thursday, April 12, 2018, Sergeant Sean Gannon was shot and killed while assisting with a warrant service at 109 Blueberry Lane, in Barnstable, MA.


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. 

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.

The U.S. Honor Flag was raised over Yarmouth Police Department Headquarters on July 19, 2019, to Honor Sgt. Gannon's service and sacrifice.  The custom USHF Gloves worn to handle the U.S. Honor Flag during this tribute were gifted to Sgt. Gannon's family.