Further Analysis
The Justice Department reviewed the HSCA report and the National Academy of Science's study of the acoustical evidence. It reported to the Judiciary Committee on March 28, 1988 and rebuked the HSCA'a conclusion of a probable conspiracy.
In 2003, an independent researcher named Michael O'Dell reported that both the National Academy and Dr. Thomas had used incorrect timelines because they assumed the Dictabelt ran continuously. When corrected, these showed the impulses happened too late to be the real shots even with Thomas's alternative synchronization. In addition, he showed that, due to a mathematical misunderstanding and the presence of a known impulse pattern in the background noise, there never was a 95% or higher probability of a shot from the grassy knoll.
A November 2003 analysis paid for by the cable television channel Court TV concluded that the gunshot sounds did not match test gunshot recordings fired in Dealey Plaza any better than random noise. In December 2003, Thomas responded by pointing out what he claimed were errors in the November 2003 Court TV analysis.
Read more about this topic: Dictabelt Evidence Relating To The Assassination Of John F. Kennedy
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