DNA Evidence and Prior Convictions NPR's Barbara Bradley reports on a controversy over whether or not DNA evidence should be used to overturn a prior conviction. More convicted prisoners are trying to prove their innocence by testing evidence as far back as 20 years. But, the use of DNA science is proving to be problematic in many of these cases because evidence has been thrown away or destroyed.

DNA Evidence and Prior Convictions

DNA Evidence and Prior Convictions

Audio will be available later today.

NPR's Barbara Bradley reports on a controversy over whether or not DNA evidence should be used to overturn a prior conviction. More convicted prisoners are trying to prove their innocence by testing evidence as far back as 20 years. But, the use of DNA science is proving to be problematic in many of these cases because evidence has been thrown away or destroyed.