Here's a fun one about Allen Dulles and it doesn't even have shit to do with the Kennedy assassination:
Dulles, one of the key architects of American Cold War policy, spent the back third of World War II actively thwarting the efforts of Allied Nazi hunters, and breaking fascists out of prison; there's a pretty serious pile of evidence that the FDR admin was using him as a fly trap and planned to arrest his ass for treason after the war.
Then FDR died and Truman put him in charge of the CIA.