With his execution still on hold, Richard Glossip’s lawyers have been trying to find new witnesses who could prove his innocence. That search has been aided by a major documentary series on American television. Acclaimed filmmaker Joe Berlinger believes Glossip has been the victim of a miscarriage of justice, and has been tracking down some of the key figures who were responsible for his murder conviction. Excerpts from “Killing Richard Glossip” courtesy of Investigation Discovery/Radical Media.