Shortly after the Assassination of John F. Kennedy , newly-inaugurated President Lyndon B. Johnson convinced Warren to serve as the head of a bipartisan commission tasked with investigating the assassination . Many individuals , both inside and outside the United States , suspected that Kennedy had been assassinated as part of a conspiracy by Cuba , right-wing groups , or various other organizations . From December 1963 to October 1964 , Warren simultaneously served as chief justice of the United States and chairman of the Warren Commission . It was an unhappy experience for the chief justice . As a judge , he valued candor and justice , but as a politician he recognized the need for secrecy in some matters . He insisted that the commission report should be unanimous , and so he compromised on a number of issues in order to get all the members to sign the final version . The commission concluded that the assassination was the result of a single individual , Lee Harvey Oswald , acting alone
Assassination of John F. Kennedy
Assassination of John F. Kennedy
Earl Warren