Episode Three of Just Science, funded by the National Institute of Justice’s Forensic Technology Center of Excellence [Award 2016-MU-BX-K110], features Dr. Ryan Lilien, from Cadre Forensics and Todd Weller, from the Oakland Police Department talking about their groundbreaking research in optical topography and firearms identification. Optical topography is a mean to give firearms examiners data that is close to a perfect representation of an impression. This research provides the possibility that in the future we will be able to relate the human examiner's judgment to a statistical representation. Note: This interview occurred in June of 2016. https://forensiccoe.org/episode-three-3d-optical-topography/