8 days after JFK, the 35th president of the United States, was assassinated in Dallas, Texas, The acting vice president, LBJ, formed a commission to investigate Kennedy’s assassination. “The Warren Commission” was formed by Johnson on November 29th, 1963. Since Lee Harvey Oswald, JFK’s assassin, was killed 2 days after Kennedy by Jack Ruby, his motive behind the assassination remains unknown. The commission reviewed reports by the Federal Bureau of Investigations, Secret Service, Department of State and the attorney general of Texas. The Warren Commission listened to over 552 witness testimonies and travelled to Dallas several times to visit the site where Kennedy was shot. They concluded that Oswald acted alone and that the Secret Service poorly planned  Kennedy’s visit to Dallas. Many critics believe that a second gunman was involved in the fatal shooting. Approximately 10 months after Kennedy’s assination, the final report was presented to Johnson and made public 3 days later, finally ending the investigation.

All Information from: https://www.history.com/this-day-in-history/lbj-forms-commission-to-investigate-kennedy-assassination