I've loved your writing and shows, and have some things from different episodes or passages that stand out in my mind. These shows were such fun for me because I viewed them as journeys down completely separate roads. Rockford was a private eye, the Commish was a cop. They worked the same general beat, however they couldn't have been more different as people. As you may know cops often refer to their badges as their 'tin'.
Internal affairs is that division, invested in prosecuting cops often removing their badges.
I had written about internal affairs for years. However my perceptions were mostly drawn from novels, TV and motion pictures. In these venues they are usually portrayed as sour, angry policemen dedicated to screwing their brother cops. It occurred to me that this was probably inaccurate. I decided to make a trip downtown to the internal affairs division and hang out.