The Warren Commission was an unhappy experience for the chief justice.  As Willens recalled, “One can't say too much about the Chief's sacrifice.  The work was a drain on his physical well-being.”  However, Warren always believed that the Commission's primary conclusion, that Oswald acted alone, was correct.  In his memoirs, Warren wrote that Oswald was incapable of being the key operative in a conspiracy, and that any high-level government conspiracy would inevitably have been discovered.  Newsweek magazine quoted Warren saying that, if he handled the Oswald case as a district attorney, “I could have gotten a conviction in two days and never heard about the case again.”  Warren wrote that "the facts of the assassination itself are simple, so simple that many people believe it must be more complicated and conspiratorial to be true." Warren told the Commission staff not to worry about conspiracy theories and other criticism of the report because “history will prove us right.”