a deep dive into the real-life case of jens soering, behind bars for nearly 32 years for a brutal crime he says he did not commit. >> it's a natural human emotion to want somebody to blame. >> reporter: and jens' multi-decade crusade for freedom has now attracted a dream team of a-list supporters. that's screen legend martin sheen leading the q&a at that l.a. showing. >> he could not possibly have been at the scene. >> reporter: there's also music mogul jason flom the man responsible for launching katy perry's career. ♪ >> reporter: and a founding board member of the innocence project. >> he is somebody who could have and should have known better, and he was blinded by love. >> reporter: even german chancellor angela merkle has advocated for jens' release. but his two strongest advocates, ironically, aren't high-profile celebrities or hot-shot defense attorneys. they're police officers. >> as far as him physically killing these people, no, i don't think he did. >> reporter: one is an investigator who originally worked on the case. >> show me. >> reporter: the other, a current sheriff no

jens soering has type-o, along with nearly 40% of the population. o shows the jury a bloody sock print that he said matches jens's foot. >> and you pull that out, and it matches, and it fits like a glove. >> reporter: at the end of his three-week trial, the juror doesn't even need to sleep on it. >> we the jury find the defendant guilty. >> reporter: jens is convicted to life in prison. he has spent nearly every day since fighting to free himself and now, he may be closer thannen. >> what's up, sheriff? >> reporter: still ahead, in pursuit of truth and justice. what 21st century dna might reveal. stay with us. some air fresheners are so overwhelming, they can... send you and your family running. introducing febreze one for fabric and air. no aerosols. no dyes. no heavy perfumes. it cleans away odors for a pure light freshness... so you can spray and stay. febreze one, breathe happy. jimmy's gotten used to his whole yup, he's gone noseblind. odors. he thinks it smells fine, but his mom smells this... luckily for all your hard-to-wash fabrics... ...the