According to an article of the Los Angeles Times in 1992, the producers of this movie were the subject of intense surveillance by the Special Investigation Section during the making of the film.
The cloak and dagger man featured on Scott Glenn's visit card and shirts is the actual logo of the Special Investigation Section.
Lou Diamond Phillips and Scott Glenn starred in Extreme Justice (1993) together. And has also gone on to co-star in Courage Under Fire (1996) with Denzel Washington (no scenes together) and the 2005 film, Gone But Not Forgotten, together.
The featured Code 7 bar was a real bar opposite the L.A.P.D. Parker Center in downtown Los Angeles, but it has since shut down.
The french dubbing was so lousy that they translated Internal Affairs as International Affairs and also called them RG - Renseignements Généraux, the equivalent, at this time, of the FBI or British Special Branch or MI 5. In France, the equivalent of Internal Affairs is Inspection Générale de la Police Nationale (IGPN) but was called Inspection Générale des Services in the nineties.