FBI forensic review could free thousands of prisoners
Found on New Scientist on Thursday, 12 July 2012
The review follows numerous investigations that have cast doubt on the validity of most forensic methods. Firearms and bullet analysis, for instance, can wrongly place innocent people at a crime scene.
But even DNA evidence is fallible: different labs can return very different results for the same sample.
An interesting question is how many people have been executed because of such false evidence. You can easily release people from jail and pay them a sum of money as some sort of excuse, but you can't bring back the dead.