As a private citizen in 1962, he broadcast incendiary statements urging people to rise up and fight the integration of the University of Mississippi. White supremacists answered his call, and rioted for hours, with two civilians killed execution-style and hundreds wounded, including six Federal marshals. Walker was arrested on charges of insurrection and sedition against the U.S., and was ordered for psychiatric evaluation by then-Attorney General Robert F. Kennedy, but only spent a few days under observation. Walker and Hargis then embarked on a speaking tour of the nation, spreading conspiracy theories and racist beliefs. His life unravelling in the years ahead, Walker was arrested in Dallas in 1976 for public lewdness for fondling an undercover police officer.
In an ironic convergence of history, Lee Harvey Oswald, just months before assassinating President Kennedy, nearly assassinated Walker as he sat in his dining room with the same rifle used in the Kennedy assassination. Had he been successful, he would have likely been apprehended or on the run, and we may have had one less racist and one more beloved President.