After 23 years in federal law enforcement (Deputy US Marshal) I always thought that the cop show that most closely resembled my office was "Barney Miller." Every character on the show was mirrored in at least one guy in the office. (I alway thought of myself as Dietrich.) We didn't do patrols, so none of the action shows came so close. Even the tv shows that portrayed US Marshals were way off the mark--too much drama, not enough routine and tedium. But that wouldn't make a good program would it?