LondonJohn,
Yes he certainly should not be convicted if the trial were held today, and I would argue should not have been convicted previously (the absence of physical evidence and some of the testimony was dubious right from the start). Yet in the American system, the burden of proof shifts to the defendant once he or she is convicted, and the
bar is set very high: "But the judge overseeing the hearing, William T. Moore Jr., decided that in order to overturn the original jury verdict, Davis needed not only to cast doubt on the evidence against him, but to provide 'clear and compelling' proof of his innocence. In an August 2010 ruling dismissing Davis' appeal, he declared that while the state's case 'may not be ironclad,' Davis failed to make a showing of 'actual innocence' and thus should not be granted a new trial. The evidentiary hearing was the first such legal proceeding in more than 50 years."
I think that this position (which may be legally accurate) is logically unsound*. Why isn't a new trial the place to show "actual innocence" in a "clear and compelling" manner? I am highly critical of aspects of the Italian system, but this is one area where the American system does not recommend itself relative to the Italian one. Although I strongly hope the someone does the right thing in the Davis case (and stays the execution), I think that this case and the Todd Willingham case indicate that there is a problem under the present laws for inmates who uncover exculpatory evidence that falls short of proof of innocence.
*perhaps "problematic" or "paradoxical" is closer to my meaning than "logically unsound."