Derrick Hamilton (after serving time for manslaughter) was convicted of murder on the testimony of a single eyewitness.  He was released from prison after 20 years.  He represented himself in the main.  A now discredited detective developed the testimony of a witness who was found to be incredible.  The Brooklyn Prosecutor found her testimony was inconsistent with medical and scientific evidence and that the witness was not credible.
What questions does this raise in your mind about the role of judges? Policemen? Public defenders? Prosecutors? The death penalty?

via OTHERWISE: Wrongly Convicted Man Was His Own Best Advocate – NYTimes.com.