Dallas PD: no gunshot residue on Oswald..
This is a textbook example of why the 57% who used to believe Oswald acted alone no longer do. Because the Internet has given everybody with a computer the ability to post incorrect or incomplete information -- invariably represented as the gospel truth -- where the entire world can see it.
Direct cut-and-paste from the actual Warren Report:
During the evening of November 22, the Dallas Police Department performed paraffin tests on Oswald's hands and right cheek in an apparent effort to determine, by means of a scientific test, whether Oswald had recently fired a weapon. The results were positive for the hands and negative for the right cheek. Expert testimony before the Commission was to the effect that the paraffin test was unreliable in determining whether or not a person has fired a rifle or revolver. The Commission has, therefore, placed no reliance on the paraffin tests administered by the Dallas police.
On the face of it this would seem to incriminate Oswald in the murder of Dallas Patrolman J. D. Tippit but exculpate (or at least not incriminate) him in the Kennedy assassination. Except the Warren Commission Report also references a test in which FBI Agent Charles L. Killion fired three rounds from the Oswald rifle using an ammunition "similar" to what Oswald (allegedly) used and then was administered a paraffin test. Afterwards, both of Agent Killion's hands and his right cheek tested negative for GSR.
The Dallas police DID FIND GSR on Oswald's hands, so to state "no gunshot residue on Oswald" is patently false. And whether the lack of GSR on his right cheek is exculpatory is debatable since testing with the same weapon showed it could be fired without leaving GSR on the shooter's cheek.
This also is an example of why the influence of misinformation continues to grow with time. It took me close to 400 words to comprehensively refute seven words of misinformation. And the body of documented facts on the Kennedy assassination has been more or less static for 60+ years, but misinformation continues to be invented.
As Jonathan Swift wrote, "Falsehood flies, and the Truth comes limping after it."