This is one of the best essays ever written on the logical and practical weaknesses of several methods of human identification -- and of methods of identification in general:
Erroll Morris What's in a Name? (Part 2) NYTimes (May 1, 2012)
&&&
The dynamic evidence page
Evidence marshaling software
MarshalPlan
It's here: the
law of evidence on Spindle Law.
See also
this post and
this post.