From that article...But suppose Cairns was correct? And the Warren Commission did not "fail to deal with the issue"----They just ignored it! Just like they ignored Seth Kantor's report that he saw Ruby at Parkland...just like they ignored Roger Craig's report that he saw [who he thought was Oswald] coming down the knoll and get into a vehicle...Just like they ignored Arnold Rowland who described a gunman lurking in a window on the west side of the sixth floor...Just like they ignored any other witness whose testimony conflicted with the Oswald did it all alone conclusion.
And it should be noted that we from WC FBI files that the FBI interviewed Dr. Cairns and that he had told the FBI that the Harper fragment was occipital bone.
The WC did not ignore Craig's or Kantor's statements. They essentially accused Craig of lying and said Kantor was mistaken. They took Jack Ruby's word over Kantor's!