Massachusetts unveils K-9 Heroes plate honoring Sergeant Sean Gannon, Nero

Every time a Massachusetts driver spots the new K-9 Heroes plate, the memorial reaches back to April 2018, when Yarmouth police Sergeant Sean Gannon and his K-9 partner Nero were shot while serving an arrest warrant. Gannon died from his wounds. Nero survived. Now the state’s specialty plate puts both names, and the story behind them, into daily public view.

Massachusetts unveiled promotional filming for the plate on April 17, showing handlers, their dogs, cruisers and the finished design. The artwork includes Nero and the initials “SG” for Sean Gannon, a New Bedford native whose death has remained central to the state’s discussion of K-9 duty, sacrifice and support. The plate was approved in September 2025 and remains available for pre-order at $40, with 3,000 orders needed before production can begin.

The effort came from the K-9 PTSD Research Center in Seekonk, a volunteer-led group that spent years pushing the project forward. The nonprofit said the idea began in 2021 after Florida announced a K-9 dedication plate, prompting the question of why Massachusetts should not have one of its own. The result is a charity plate designed to honor both police K-9s and the handlers who work beside them across the commonwealth.

The memorial has a sharp policy edge, too. Gannon’s death led to Nero’s Law, which Gov. Charlie Baker signed in February 2022. The law allows first responders to treat injured police dogs at the scene and transport them to veterinary hospitals, closing a gap in state law that had previously barred ambulance transport of animals. Massachusetts first-responder training has since incorporated the law’s implementation, turning a line-of-duty tragedy into a practical change for K-9 emergencies.

Gannon’s mother said any tribute to her son means the world to the family. That emotion now sits behind a plate that will move from one vehicle to another, one road to the next, as a public reminder that working dogs in Massachusetts are not mascots, but partners in police service.

The broader legislative push has not stopped there. Massachusetts lawmakers are also considering a separate measure commonly referred to as Dakota’s Law, aimed at additional protections for retired police dogs. Together, the plate, Nero’s Law and the new proposal show how Gannon’s legacy has become part memorial, part policy, and part permanent signal on the road.