A convicted serial killer on death row has confessed to murdering 26 women, according to a new documentary. Joseph Naso, who was sentenced to death in 2013 for killing four women, claimed he had killed 26 victims in total. The revelations emerged from interactions with another inmate, William Noguera, who spent over a decade building trust with Naso at San Quentin State Prison.

Nasos’ admissions were shared during conversations with Noguera, who described how Naso initially dismissed investigators’ claims about a “list of 10” women. Noguera recounted that Naso laughed when told authorities had linked him to the list, stating, “They got it all wrong. Yeah, I killed them women, yes. But those aren’t my top—those aren’t my list of 10. Those are my top 10.” He later revealed he had murdered 26 women.

Details from the documentary suggest Naso’s crimes may be supported by evidence found during a search of his home, including a coin collection with 26 gold heads, which Noguera claimed represented his victims. Investigators previously discovered photographs of what appeared to be dead women among Naso’s belongings, along with a “hit list” containing cryptic descriptions of female targets.

Naso, who was described as a father of two, Little League coach, and school photographer, maintained his innocence during early interviews despite being sentenced to death. Over time, he reportedly opened up to Noguera about the extent of his crimes, though no further details about specific victims or locations were provided in the accounts shared.

The documentary, set for release next month, explores Naso’s double life and the chilling nature of his confessions.