The President's Commission on the Assassination of President Kennedy was announced by President Johnson on November 29, 1963, one week after the shots rang out in Dallas, and five days after alleged assassin Lee Harvey Oswald was killed while in police custody. A little under 10 months later, the "Warren Commission" delivered this 888-page Report. The Report found that Lee Harvey Oswald killed President Kennedy, alone and unaided, and that similarly Oswald's killer Jack Ruby was a "lone nut."

This Report was followed up a couple of months later by the publication of 26 volumes of Hearings and Exhibits. The Warren Report was widely hailed by the media as an exhaustive study produced by honorable and prestigious men, and was fairly widely accepted by the American public. It was not until a few years later, with the publication of several critical books and magazine pieces, that this acceptance began to turn into widespread disbelief and even ridicule of the Commission's conclusions.

The Warren Report remains the definitive statement of the "lone nut" theory of the assassination of President Kennedy.