Actually saw a much more interesting programme last night . "Did they really do it ".
A brief summary - man accused and jailed for rape and murder . Various "experts " arguing about blood grouping and forensics saying they were not reliable in the 80s .Circumstancial evidence. Man pleads innocence . Grandmother dobs him about his timings being wrong . there are other suspects . Man is put to death still pleading innocence . DNA evidence gets more accurate . Still people fighting for him . Final result turns out he was guilty .
It was interesting .
At the point of the DNA evidence being released there were people who genuinely believed it could go either way.
I am sure Skippy will come along and give you a full lecture about the case - but the above is a summary 
Was it about the person I mentioned a few days ago (Roger Coleman)? If so this was actually a pretty big deal here because it took a lot of starch out of the anti-capital punishment crowd.
As he was being put to death he insisted he was innocent as many others have while they were being readied for execution. It had been asserted that at that point they would not be lying about being innocent and suggested when they assert it till the end they must be innocent. The proof he was guilty tore that argument to shreds.
This should not have been as big a surprise as it was. Before they put him to death they did rudimentary DNA testing that supported his guilt (excluded like 98 percent of the population) and he left work early that day so his supposed alibi was no good. He had blood on his pants that was the same blood type as the victim. Well after his death advanced DNA testing took place which confirmed his guilt. Supporters made such a big stink that the governor did the extraordinary by allowing the advanced DNA test that left no doubt he was guilty.
What is difficult for people in other countries to understand is that when a prisoner is tried in a state court, apart from the state appeal process there is a federal appeal process that can be turned to. A state supreme Court action can be appealed to the US Supreme Court so there is a means for federal oversight anyway. But in addition there is the ability to try pursuing a federal action. This is why you have so many different proceedings to contend with in the US. Clemency can be sought from the governor and president.
If someone is tried in federal court the process is streamlined they only can use the federal courts and can only seek clemency from the president. Federal courts can only try federal crimes. State courts can try state or federal crimes.
This is why state Death Row can seem so convoluted.