The Washington Post
DALLAS – The news brings almost routine stories about wrongfully convicted prisoners who are exonerated by DNA testing, but they often have traveled widely divergent paths to freedom.
In some states, only prisoners facing execution have the right to DNA testing to try to prove their innocence. In others, anyone who pleaded guilty is barred from asking for the testing. In the patchwork of legislation passed by Congress and 48 states, even individual prosecutors can carry great weight.