I dispute that “so many” primary suspects and even convicts are later proven to be innocent. How often do you think this happens? What is the percentage of convicts who are later completely exonerated? Surely it is far less than 10% and I have allowed a 10% chance that Knox and Sollecito are innocent.
First of all, just because they aren’t completely exonerated does not mean they are not innocent. A better question is what the percentage chance of innocence is.
Second of all, this assumes that letting a guilty person go free and sending an innocent person to get punished is of equal weight, which it is not.
First of all, just because they aren’t completely exonerated does not mean they are not innocent. A better question is what the percentage chance of innocence is.
Second of all, this assumes that letting a guilty person go free and sending an innocent person to get punished is of equal weight, which it is not.
The discussion is about the probability of actual guilt, not the expected utility of punishment, so that’s not relevant.
ETA: Relatedly, I’ve commented elsewhere that a 90% probability of guilt for murder should be well within the “not guilty” verdict range.
Oh right, good point.