Sheesh. Is any source not questionable? Or is it just when they don't agree with the administration does it become questionable? Why should we believe him? Thousands of man hours by 'our' inspectors and top of the line technology can't find a thing, but hey we've got this out of work general wanting to stay on the good side of the US Armed Forces so it must be true!! If it is, then I'm quite sure he would be able to lead inspectors to the 'cache'.
That is unless he has selective amnesia, but then of course there will be some excuse for that too won't there?