YARMOUTH, MASS. (WHDH) - Yarmouth K-9 Officer Sean Gannon was posthumously promoted to sergeant ahead of his funeral Wednesday, the department said.

Police officers from across the country are expected to attend Gannon’s funeral, who was shot and killed in the line of duty last Thursday while serving a warrant at a home in Barnstable.

A funeral Mass for the 32-year-old will be held at St. Pius X Roman Catholic church in Yarmouth. The Mass will be followed by a private burial for family and colleagues.

Massachusetts State Police say K-9 units from multiple departments are expected to line the route from the church to the cemetery.

Gannon, who was married, was an eight-year veteran of the department. Gannon’s dog, Nero, was shot but underwent surgery and is recovering.

Yarmouth police announced the promotion in a statement Wednesday morning. The statement read in full:

Yarmouth Police Department Sergeant Sean McNamee Gannon, age 32, died on impact in the line of duty from a gunshot wound to the head on April 12, 2018.

Born August 22nd, 1985 in New Bedford, Massachusetts, Sergeant Gannon graduated from All Saints Elementary School in 1999, and Bishop Stang High School in North Dartmouth in 2003.

Sergeant Gannon graduated with honors from Westfield State University in 2007 with a Bachelor of Science in Criminal Justice, a Master’s with honors from Massachusetts Maritime Academy with a degree in Emergency Management in 2011, and the Massachusetts Bay Transit Authority Municipal Police Academy.

Sergeant Gannon’s internships included service with the Nantucket Police Department, and the Westfield Police Department, and earned certifications as an Emergency Medical Technician and Life Saving Instructor.

Sergeant Gannon started his Law Enforcement career at Stonehill College in 2007 as a member of the Campus Police Force before joining the Yarmouth Police Department in 2010.

Sergeant Gannon was part of the Emergency Management Unit, a part-time member of the Proactive Anti-Crime Team, and he was the first full-time K9 narcotics officer for YPD with his devoted K9 Thor.

After retiring K9 Thor, Sergeant Gannon acquired his beloved K9 patrol dog Nero, who was also shot and injured at the scene of the crime but was rescued and is expected to survive and return to the Gannon family.

Sergeant Gannon leaves a legacy of high moral integrity, infectious humor, and collaborative work with colleagues. He enjoyed travel, working with his hands, volunteering his time to Big Brothers Big Sisters of Cape Cod and the Islands and being outside.

He loved spending time with his family and friends.

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