My only little sliver of doubt is that he may not have acted alone, in that he may have been part of some sort of plot- whether he realized it or not.
I accept the probability that he was a lone nutjob- God knows we have lots of them in this country- it would take more time than I have this afternoon just to make a LIST of the whacked-out losers who have shot and killed people for no particular reason just in the past five years.
But I do not consider the "case closed". I don't think it will ever be closed to everyone's satisfaction.
Robert Oswald does. And he's Lee Harvey's blood brother (they have a half brother).
WHAT this tells me is you haven't fully researched Lee Harvey Oswald's background, life, history or psychological make-up.