Just finished reading "Reclaiming History" by Vincent Bugliosi. A must read for any JFK assassination enthusiast, but he takes down all the conspiracy theories.

The "Warren Report" was published in September 1964, less than 1 year after Kennedy's death. For about a year or two after that, it was considered in bad taste to publicly cast doubt upon the Report's findings/conclusions. But by 1966 it was clear (or, as clear as anything can be as a result of polling/survey data) that most Americans did not believe they had been given the full story. That disbelief has continued to this day, and I daresay it will continue for as long as Kennedy's assassination is remembered.

For me the final nail in the coffin of the JFK conspiracy is listening to Oswald's brother saying with conviction that there isn't a single doubt in his mind that his brother did it.