DNA can be ruined if the propper care with sample collection and preservation are not taken. Among the things that called my attention, a particular item is the nature of the fluid in which the "hand" is immersed. Check http://www.forensicdna.ca for some more detail.
Do you think that's why the DNA from the hand was unusable?:
....Our slot blot result indicates that there is no DNA present in the tissue samples that you submitted to DNA Diagnostic Center on 5/23/06. We also performed a 1% agarose yield gel to determine if the DNA from items 01.A and 01.B is degraded. Based on this test the DNA from items 01.A and 01.B is highly degraded and, therefore, a DNA profile cannot be obtained.....
I found the failure of the DNA testing to be yet another frustrating dead end, and cite situations like this as proof that DNA testing is no magic bullet (as well as the "no match to any known species" results in other situations) when it comes to identifying an unknown species.
Anyone familiar with Tube's posts should be aware of whats he's talking about. Its more than enough to raise some red flags, at least for my standards of evidence quality. Lets say there are parallels with Ivan Marx story.
Are there "opinions" out there in Skepticsville that the DNA from the hand was purposely compromised by placing it in a preservative solution that would destroy it's DNA value?