Parrots have helped out in the streets. In 2010, a Colombian parrot named Lorenzo was taken into custody after he was caught warning cartels about police.
Ravens are pretty clever, and can actually help humans who get lost on hikes. Specifically, Shade the Raven helps out hikers in the Arizona backcountry.
Dogs have an amazing sense of smell, which is helpful for police and the military. They can sniff out drugs, bombs, and some can even revive an unconscious officer.
Horses have many roles in society, and are sometimes used for police or the military. Their towering physicality helps intimidate protestors and rioters.