At that time, it is possible that the 'good guys' were still working behind the scenes. Perhaps the powerful perverts of Hollywood didn't quite own the FBI/DOJ yet and could only do so much. There are a lot of interesting 'coincidences' about Kubrick's death, but I'm still chalking it up as conspiratorial until I see something more substantial.

Btw, Kubrick was an absolute genius filmmaker. He's one of my favs.