Well, where I'm from. . . [ she takes in a long breath, and exhales... woo, this is going to be a long story. ]

Our mental states and personal tendencies can be quantified, and these are policed. This is called one's Psycho-Pass.
When a person's crime coefficient goes up a certain value, they are deemed a Latent Criminal, and are arrested and isolated. After therapy, and these latent criminals still can't get their crime coefficiency down, they're asked to work for the Ministry of Welfare and Public Safety Bureau as Enforcers.

I work for the Ministry of Welfare and Public Safety Bureau as an Inspector, which means I'm in charge of the Enforcers, basically.