In the Lang'ata school land saga it was, rightly or wrongly, alleged that police dogs were used for crowd control. The matter of police dogs is governed by the 21-page Chapter 12 of the Police Standing Orders and there are other varied laws that highlight the legal relationship of man and his best friend.
Historically, as early as the 14th century, dogs were being used in France to guard dock installations. In 1888, the London Metropolitan Police Force used bloodhounds to track suspects by scent as part of the infamous investigations into the Jack the Ripper murders.