Josiah Thompson, professor of philosophy at Haverford, who worked for a time with Life as a consultant on the assassination of President Kennedy, does not include himself among the simple detractors of the Warren Commission, wishes rather to move beyond this stage ""to synthesize evidence and point the way to an emerging conclusion."" He nevertheless scores the Commission for its haste, its ""uncritical evaluation of the facts"" and its predisposition to prove Oswald the lone assassin; in consequence, they have overlooked much of the material available. He discards the single bullet theory of the Commission, reconstructing instead, through evidence including the Zapruder film, the testimony of Governor and Mrs. Connally, the preserved state of CE 399, ear and eye witnesses, a theory of the assassination which supposes that four shots were fired by three assassins in three different locations. His study, he feels, suggests ""that there are threads in this case that should have been unravelled long ago instead of being swept under the Archives rug."" He also feels that four years after the event, ""the question of Oswald's guilt must remain--still unanswered."" Professor Thompson's book serves to indicate areas of confusion for further probing, although the introduction of new evidence rather than sifting the old may hold more current interest and promise.