Margo Hill deliberately buried exculpatory evidence from the district attorney.
We haven't been able to get (DNA) in most of the capital cases. In 75 percent of the cases we take on, we can't do DNA because the evidence has been lost or destroyed,
DNA evidence has revealed a finite but troubling class of convictions tainted by what is best described as 'false facts': forensic evidence that likely carried great weight with the original jury, but which is now known, to a scientific certainty, to have been erroneous.
In most of our cases, the critical biological evidence has either been lost or destroyed.
There's an old saying that the absence of evidence is not necessarily evidence of absence.