The Dangers Of A Secret Police

Multiple societies throughout history formed a secret police force for the government much to the destruction of said society. Why is such a topic relevant? The FBI's incident with a man in Utah has Jesse's eyebrows raised. A 300-pound 74-year old man gets a bullet from the FBI at his house in the middle of the night, did it really have to end this way? The questions remain unanswered as details seems to be withheld from the public.