Perhaps the policy prohibiting background checks was to blame for the fact that the police force, usually staffed by men of high moral values, had been infiltrated by so many__________ .
What are those two words?
What I think is that : A policy is prohibiting background checks because police men had been infiltrated by ____ . Since, the policy is trying to prohibit or prevent background checking (which means they find that they don't need to check further background) because those men which police encountered might have been good men, so they found no need to verify further. Since, the blank must have a good connotation, so gentries and vassals might be the answers.
But the given answers are : reprobates and rogues.
What am I missing?