As a former member of the dog unit myself, I know the strong bond between a police officer and his dog.
Whilst they are working dogs, they also become a close and important member of the police officer's family. This is a very sad occasion.
More top news
The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.
Police have arrested a man wanted in connection with a burglary at the home of pensioner Richard Osborn-Brooks.
The rally comes after it emerged that the Home Office destroyed thousands of landing cards documenting the arrival of windrush-era migrants