police state 
noun
A totalitarian state controlled by a political police force that secretly supervises the citizens' activities.Even dictatorships and police states have fewer citizens behind bars....
- On the other hand, cooperation with corrupt law enforcement organizations - or with police forces from police states - compromises our own law enforcement process.
- The practice of detaining people in the streets and busting into their homes and workplaces to check on their identification is common in police states.