in the book "the Sinatra club" sal polisi says that gotti came to him and told him they were going to whack desimone, and gotti asked polisi to come along with them, polisi declined, he was asked because he was foxy jethroe best friend,

so gotti did have a hand in desimone's killing. also I think it's true that vario would not let gotti kill jimmy burke,he was too good as an earner, but, all in all henry hill always was a big liar, and this new book is probably 85 percent fiction.