In exchange, Giancana expected Sinatra would "be able to keep the heat off" him.
CNN: FBI Files: Early Accusations Of J.F.K. Infidelity
2.
The chapter's conclusion: Mr. Giancana was killed as part of a conspiracy to cover up the conspiracy to kill the president.
WSJ: JFK Assassination Conspiracy Theories Sell Lots of Books
3.
The memo quotes a Las Vegas lawyer who said Giancana gave Sinatra "a bundle of money" to help Kennedy's presidential campaign in the crucial West Virginia primary.
CNN: FBI Files: Early Accusations Of J.F.K. Infidelity