In the early years of the fbi  Hoover discovered that his agents were generally not quite capable (for a number of reasons) to deal with the murderers and psychopaths of organized crime in the United States; so, Hoover and his associates set out to correct this inadequacy in a calculated and systematic manner: his agents when deemed appropriate would (by training and mind programming) become themselves homicidal sociopaths.

His plan worked so well that in today's fbi, one cannot always determine which agents (and operatives) are cold blooded murderers and torturers.For example:

People who knew H. Paul Rico (ex-fbi agent)"... recall him as a cop who dressed and talked like a gangster. Only much later would it become clear that it was not an act."

Hitman, Howie Carr, Tom Doherty Associates,LLC,175 Fifth Avenue, New York,NY 10010,2011, p.63.