This for sure!!
We have some law enforcement in our family (Police Chief, state police, SWAT ) and they all say exactly this!! They also have no problem saying that there are Great officers, Good officers and sadly, not so good ones. One brother in law is an investigator in the State Police. One of his duties is to investigate complaints against fellow officers. He would be the first to say, that while most officers are good and dedicated men and women, that there are definitely some bad apples and he has no problem weeding them out.
Yup, just like any other profession. I am shocked to constantly see teachers charged with rape/molestation of students that they teach. Also, I know someone personally whose husband (a teacher) who was going to the library every morning before teaching to look at child porn. There are bad eggs in every profession.