Joseph Naso may have slain double-initial victims in homage to executed predator

Joseph Naso, the “Alphabet Killer,” may have been paying twisted homage to a death row inmate.

The assertion was made by retired FBI task force investigator Ken Mains, who is attempting to solve cold cases that may be linked to the 91-year-old. 

Naso’s crimes are explored in the new Oxygen true-crime docuseries, “Death Row Confidential: Secrets of a Serial Killer.”

Naso is a former photographer convicted in 2013 of killing four women.

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“I was able to get into his brain [during my investigation] and understand that he had an idol, a role model, just like we all do,” Mains told Fox News Digital. “His happened to be … Caryl Chessman. And Caryl Chessman was executed in San Quentin State Prison in 1960. … He invited Joe Naso, who was a pen pal of Caryl Chessman’s, to his execution.

“I believe he was killing these double initials as a homage to Caryl Chessman.”

Naso gained his grim nickname after being found guilty of murdering four women whose first and last names began with the same letter. The victims included Roxene Roggasch, 18; Carmen Colon, 22; Pamela Parsons, 38; and Tracy Tafoya, 31. Their deaths occurred between 1977 and 1994.

Oxygen’s true-crime docuseries, “Death Row Confidential,” explores the case of California man Joseph Naso. (Oxygen)

Behind bars, Naso became chatty with William Noguera, a fellow death row inmate and artist. Noguera was assigned to assist elderly prisoners as part of a prison program for inmates with disabilities. When Naso needed to be pushed in his wheelchair, Noguera was in charge. For more than a decade, Noguera built trust with Naso inside San Quentin.

In the documentary, Noguera says Naso confessed to killing 26 people.

Ken Mains is now a cold case investigator. (Oxygen)

Through their conversations, Noguera learned that Naso was well-versed in the biographies of other notorious serial killers and rapists, Vanity Fair reported. According to the outlet, he expressed a “lifelong devotion” to Chessman, the “Red Light Bandit” of the 1940s. Chessman was convicted of robbery, automobile theft and kidnapping with associated bodily harm, according to the FBI.

According to the outlet,…