I think there is a very good chance ‘Poppy’ Bush will be on trial by the end of the year.
He may even face the chair by the end of 2018.
No matter how infirm he pretends to be, he must face justice if / when found guilty
Don’t hold your breath. His days look very limited based upon his appearance. In the documentation, Bush is likely referred to by some obscure cryptonym anyway and has no reputation for terminal work.
However, he was very involved with the Cuban ex-pats & Operation Mongoose, BoPigs. That much we know for a fact. And those men surface more than anecdotally in a cursory search in the existing JFK research records. Those guys were itching to retaliate and did not need any coaxing, just the golden opportunity. Same for the mob enemies.