"Police dogs" refers to specially trained dogs that work alongside the police to assist them in various tasks such as tracking criminals, searching for missing persons, and detecting illegal substances. Full definition
That is why they are now being used as police dogs in many cities and why they can do things like rock agility courses. (chitownpitties.org)
It soon became evident that the breed was highly suitable for the tasks set by police service and therefore they were officially recognized as police dogs in 1910. (meisterhunde.com)
The use of police dogs for goals for which they are used today has a big history behind. (snowyswan.com)