I read something earlier that stated Dr. Mitchell made these same comments during a July 4th Larry King Live interview on CNN. It's kind of ironic that he would say the same thing on some obscure radio show three weeks later, and now the mainstream media decides to run with it. Weird...
About a year ago the Walter G. Haut Affidavit* gained a little steam in the mainstream media, but not as much as it should have. In my opinion, this is a much bigger story than Dr. Mitchell's recent comments because Dr. Mitchell has been outspoken on this topic for years. While he was alive Walter Haut was anything but outspoken on this subject to either the public, or those closest to him.
Here is Walter G. Haut's wiki page.
*DISCLAIMER - I have no idea what the website I linked to containing the affidavit is all about. It was a product of a google search, and to the best of my knowledge the affidavit posted is word-for-word.