"Theophalis Wilson, you are free to go," said a Philadelphia judge recently. She was releasing a man who has been exonerated of the three 1989 killings he was convicted of as a teenager.
A jailhouse informant is rarely someone who just wants to help. Jails and prisons have a strong anti-snitching culture, so passing along information to prosecutors is a choice that could get you in serious trouble. People don't inform on other prisoners to be solid citizens; they do it to get a break on their sentences.