Noun
K-9 unit (plural K-9 units)
(US) A police dog or a police dog and its handler.
A K-9 unit was on site assisting with the search, according to the Lake County Sheriff’s Department. Source: Internet
The Winnipeg police’s K-9 unit was sent out and tracked to a home in the 300 block of Chalmers Avenue, where police said three suspects were taken into custody. Source: Internet