Judoon

The Judoon are a interplanetary police force-for-hire

Biology
The Judoon are a race of aliens, largely resembling bipedal rhinoceroses. They are stocky and have yellow blood. Female Judoon have a mowhawk whereas males are bald. Their language is mainly one or two-syllable words ending with 'o', though they can communicate using a speech translator from other species

Description
They are a mercenary police force for the Shadow Proclamation, known for their strict policy to law and their brutal, almost ruthless ways of going about it. They follow the rules at all costs, even if it's a pay and display sign, and will vaporise any offenders with their guns. Despite their logic, they are known to be quite stupid on occasions