I believe the answer is: internal affairs
In law enforcement agencies, internal affairs refers to the division that created in order to investigate potential misconducts from the employees of the agencies itself. Not taking complaint seriously, using unecessarily agressive method to enforce laws, cooperating with criminals, are examples of the things that usually attract the movement from internal affairs dicision.
Mr. Smith also expresses concern that the division that is supposed to investigate allegations of police misconduct does not take his complaints seriously. He recently filed a complaint that one officer used aggressive techniques when dealing with his son on a traffic stop. Which unit internal affairs.
