Police Officer Sean McNamee Gannon

Police Officer Sean McNamee Gannon

Yarmouth Police Department, Massachusetts

End of Watch Thursday, April 12, 2018

Sean McNamee Gannon

Police Officer Sean Gannon was shot and killed while assisting with a warrant service at 109 Blueberry Lane, in Barnstable.

Officer Gannon and his canine partner, Nero, were searching the home and located the wanted man in a closet. The man opened fire, fatally wounding Officer 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 Officer Gannon's murder. His record showed he had 111 prior offenses and was on probation.

Officer 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.


  • Age 32
  • Tour 7 years, 5 months
  • Badge Not available

Incident Details

  • Cause Gunfire
  • Weapon Gun; Unknown type
  • Offender Charged with murder

k9 apprehension, warrant service


Please contact the following agency to send condolences or to obtain funeral arrangements:

Chief of Police Frank Frederickson
Yarmouth Police Department
340 Higgins Crowell Road
Yarmouth, MA 02673

Phone: (508) 775-0445

Most Recent Reflection

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Semper Fi Officer Gannon!!

John Kearney

April 18, 2018

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