Carroll Jarnagin was the Dallas attorney who wrote to J. Edgar Hoover on Dec. 3, 1963 an account of a claim to have overheard a conversation in the Carousel Club on Oct. 4, 1963, between Jack Ruby and Lee Harvey Oswald discussing a contract killing for hire of the governor of Texas to be carried out by Oswald on a parade route, shooting a rifle from the Carousel Lounge. (The FBI report on Jarnagin requested by FBI headquarters in response which has all the documents and interviews starts here: https://www.maryferrell.org/showDoc.html?docId=56992#relPageId=98&search=jarnagin.)