WJC had two major skeletons: Chinese campaign cash and his secret visit to Moscow while a "student" at Oxford. He also had numerous minor skeletons such as Vince Foster, Ron Brown, as well as "events" that occurred while he was Governor of Arkansas.
Throw in some tantalizing sexcapades and you can imagine that the FBI was busy full time...always wondering when the next shoe would drop.
But with a global Jihad on-going that targets the West in particular, I'd wonder if WJC isn't a bit of old news...presuming that outright evidence of his complicity with Iranian Mujeaheeden in Kosovo wasn't available.
Starting an investigation, even filing a report, can keep you busy. Closing your eyes and saying "I see NOSSINK!!" won't keep you busy.