Goodbye Rocky!  You were a very good boy.

From BPD News:

The Boston Police Department regrets to announce the passing of active duty K-9 Rocky following a brief illness. Rocky was seven years old at the time of his passing and had served the City of Boston over his six-year career as a dual purpose Patrol and Explosive Detection K9. His handler and partner noted that Rocky was a great dog who enjoyed working and will be dearly missed. Our thoughts go out to this officer during this difficult time.