I just finished the 2011 miniseries "The Kennedy's" on netflix, and it was implied in there that because of doing Chicago mobster Sam Giancana wrong after the 1960 election, that he was pissed at both robert and john kennedy for attacking him after he helped them win the election.....the only thing I don't understand if Roselli helped or whoever, that with all these dying mobsters or imprisoned mobsters or former CIA agents, why doesnt someone come up with absolute proof that they helped or planned or where there, kind of like Jimmy Hoffa disappearance....I mean a zillion mobsters have flipped so this wouldn't be a stretch to talk about this.