>the possible players involved are no longer relevant either.
If the conspiracy was on the part of the spy agencies, as claimed, then the agencies involved are absolutely still relevant. If the CIA or whatever back then was willing to kill someone because he threatened to reduce their power, given the intelligence agencies have even more power now than they did back then there's no reason to think they wouldn't do it again if threatened.
If the conspiracy was on the part of the spy agencies, as claimed, then the agencies involved are absolutely still relevant. If the CIA or whatever back then was willing to kill someone because he threatened to reduce their power, given the intelligence agencies have even more power now than they did back then there's no reason to think they wouldn't do it again if threatened.