From BPD News:

The Boston Police Department regrets to announce the sudden passing of active-duty BPD K-9 Tyson. Tyson was only six years old at the time of his passing and had served the City of Boston for five years as a dual-purpose Patrol and Explosive Detection K-9. Tyson was responsible for numerous high-priority arrests, recovered firearms and protective sweeps during his time with the BPD, having a direct impact on the safety of our great city.

Our thoughts go out to his handler at this difficult time, as well as his wife and children, who had come to know Tyson as a protector and a member of their family.