Occupations of authority and power usually attract a higher number of control freaks and sociopaths I would think.
In the best case scenario they are weeded out, in the worst case they are covered up for, because they are an embarrassment or no one gives a shit.
I've also know a lot of cops with about the same taste in women as I've had in men over the years. There always did seem to be a higher incident of cheating spouses in that profession (based on local observations), whether it was from the stress of the job or the long hours I don't know...but by no means was it just the spouses out on patrol who were guilty.