Locked up for more than three decades for murder, Gilbert Lee Poole, Jr. had been serving a life sentence since 1989 based largely on a form of forensic evidence once widely used but no longer deemed reliable: bite mark analysis. Now that DNA evidence has ruled him out as the killer, Michigan Attorney General Dana Nessel (D) hailed his exoneration as the debut act of her two-year-old Conviction Integrity Unit. The post Man Imprisoned for Three.