"The cornerstone of this republic, as of all free governments, is respect for and obedience to the law." - Theodore Roosevelt.
German-American author and journalist Joachim Joesten, who passed away in 1975, believed President Lyndon B. Johnson and his political adviser Bobby Baker were critical players in the JFK assassination.
Joesten wrote several books about the assassination, including 'Oswald, Assassin or Fall Guy?' and 'The Dark Side of Lyndon Baines Johnson.'
From the website Spartacus Educational:
Joachim Joesten traveled to Dallas a few weeks after the assassination of President John F. Kennedy and spent four days there, interviewing witnesses and examining key locations. He came to the conclusion that Lee Harvey Oswald was not a lone gunman. However, he did think that he was involved in the conspiracy to kill Kennedy. "I wish to make it absolutely clear that I believe Oswald innocent only as charged, but that he was involved with the conspirators in some way."
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Joesten published The Dark Side of Lyndon Baines Johnson in 1968. Joesten argued that Lyndon B. Johnson and Bobby Baker were involved in the killing: "The Baker scandal then is truly the hidden key to the assassination, or more exact, the timing of the Baker affair crystallized the more or less vague plans to eliminate Kennedy which had already been in existence the threat of complete exposure which faced Johnson in the Baker scandal provided that final impulse he was forced to give the go-ahead signal to the plotters who had long been waiting for the right opportunity."
Robert Gene Baker (November 12, 1928 – November 12, 2017) was an American political adviser to Lyndon B. Johnson, and an organizer for the Democratic Party. He became the Senate's Secretary to the Majority Leader. In 1963, he resigned during an investigation by the Democratic-controlled Senate into Baker's business and political activities. The investigation included allegations of bribery and arranging sexual favors in exchange for Congressional votes and government contracts. The Senate investigation looked into the financial activities of Baker and Lyndon Johnson during the 1950s. The investigation of Lyndon Johnson as part of the Baker investigation was later dropped after President Kennedy's assassination and Johnson's ascension to the presidency.