There are team-ups in true crime and then there are team-ups that make you pause. Retired cold-case detective Ken Mains and former death-row inmate Bill Noguera make up the latter — an improbable duo whose collaboration is the spine of Oxygen’s new multi-part docuseries Death Row Confidential: Secrets of a Serial Killer . The show follows their work unraveling the past of Joseph Naso, a killer long suspected of far more murders than the four for which he was ultimately convicted.

SpoilerTV chatted with both men to get beyond the cameras and into what drove them to work together, how they navigated trust and risk, and what they want viewers to take away. Their answers are different in tone but aligned in purpose: find victims, give families answers, and show that even in the darkest corn

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