Debate Over Effectiveness of DNA Testing Continues

DNA has the power to cut short nightmares -- the horror of an innocent man behind bars for a crime someone else committed, the fear of a murderer walking free and looking to kill again.

In the past 16 years, DNA testing has freed scores of prisoners found to be wrongfully convicted, resolved old mysteries including murders and rapes and transformed the debate over the death penalty. It has shaken the foundations of the criminal justice system itself.

DNA proved pivotal again on Thursday, when an analysis confirmed that Roger Keith Coleman was indeed the man who raped, stabbed and nearly beheaded his sister-in-law, as a jury concluded.

Coleman was executed in 1992, proclaiming his innocence as he went to the electric chair.

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