FBI admits hair evidence is false

WaPo Headline reads:  "FBI overstated forensic hair matches in nearly all trials before 2000" with this lead:

The Justice Department and FBI have formally acknowledged that nearly every examiner in an elite FBI forensic unit gave flawed testimony in almost all trials in which they offered evidence against criminal defendants over more than a two-decade period before 2000. snip
The cases include those of 32 defendants sentenced to death. Of those, 14 have been executed or died in prison, the groups said under an agreement with the government to release results after the review of the first 200 convictions.

It took quite a bit of time to acknowledge this, since a simple experiment of taking a few hundred hair samples and then having "experts" match them would have provided the evidence of what has taken a decade and a half to disclose.  
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Just reported: FBI admits hair evidence is false: