John F. Kennedy assassination conspiracy theories of the plot was thwarted, the authors allege, because it would have revealed embarrassing evidence of American government involvement with organized crime in plots to kill Castro. A 2003 Gallup poll indicated that nearly 20% of Americans suspected Lyndon B. Johnson of being involved in the assassination of Kennedy. Critics of the Warren Commission have accused Johnson of plotting the assassination because he "disliked" the Kennedys and feared that he would be dropped from the Democratic ticket for the 1964 election. According to journalist Max Holland, the first published allegation that Johnson perpetrated the assassination of Kennedy appeared in Penn
Assassination of John F. Kennedy also found that only 20–30% of the population believe that Oswald had acted alone. These polls also show that there is no agreement on who else may have been involved. Former Los Angeles District Attorney Vincent Bugliosi estimated that a total of 42 groups, 82 assassins, and 214 people had been accused in various Kennedy assassination conspiracy theories. The last remaining documents which were required to be released under Section 5 of the President John F. Kennedy Assassination Records Collection Act of 1992 were released on October 26, 2017, while the remaining ones still classified will only be analyzed for