ernest willis is guilty. ge sentences willis to death by lethal injection. >> i was shocked. after i was found guilty, and i thought the legal system worked. and how fooled i was. you know, i had very little representation. >> willis says that after sentencing, his cousin billy told him that he felt pressured by authorities to testify against him. from his cell on death row, ernest willis maintains his innocence. with the forensic evidence against him, the chances of anyone listening may be slim. coming up, is the same evidence that convicted ernest willis the key to releasing him from death row? advances in arson science provide a ray of hope for willis. >> everything that they said was obsolete. a fire don't happen the way they say it happens. that's logistics. ♪ ♪ medicine that can't wait legal briefs there by eight, ♪ ♪ that's logistics. ♪ ♪ freight for you, box for me box that keeps you healthy, ♪ ♪ that's logistics. ♪ ♪ saving time, cutting stress, when you use ups ♪ ♪ that's logistics. ♪ [ man #1 ] i wa