Final answer:
The Warren Commission concluded that there was a single shooter, Lee Harvey Oswald, who acted alone in the assassination of President Kennedy.
Step-by-step explanation:
The Warren Commission was established to investigate the assassination of President John F. Kennedy. After months of investigation the commission led by Chief Justice Earl Warren determined that there was a single shooter Lee Harvey Oswald, who acted alone without any conspiracy involved.
This conclusion is outlined in the Report of the Warren Commission on the Assassination of President Kennedy released in 1964. Despite the commission's findings there have been numerous conspiracy theories and widespread public skepticism regarding the conclusion that Oswald was the sole perpetrator.