I'm familiar with Gerald Posner. His body of work is intended to advance his conclusion that there was no conspiracy behind the assassination. On the other hand, there is Jefferson Morley, who has committed himself through work with the Mary Ferrell Foundation to forcing the US government to realize all the records that the CIA has related to the assassination. In fact, Posner agrees with Morley that the remaining 2,500-5,000 records — several with the CIA as the stakeholder — should be public.