Judoon

The Judoon are a race of bipedal rhinoceroses who act as the soldiers of the Shadow Proclamation.

Description
The Judoon are a race of rhino-like aliens who work as a police force.

They follow the rules at all costs, even if it's a pay and display sign.

They appear in 9 episodes of Doctor who and 1 appearance in Sarah Jane Adventures.

They are ruthless and can vaporise offenders with their disintergration guns