Naso also asked jurors not to sentence him to death and said he cares deeply about people, the Independent Journal reports.
The death penalty phase of the trial is expected to last several weeks, with the prosecution planning to present evidence linking Naso to additional rapes and murders beyond those considered in the trial's first phase, the article says.
Naso was convicted Aug. 20 of killing Roxene Roggasch, 18, of Oakland, and Carmen Colon, a 22-year-old East Bay resident.
Roggasch was found dead off of Sir Francis Drake Boulevard west of Fairfax on Jan. 11, 1977.
Colon's body was found near Carquinez Scenic Drive in Port Costa in Contra Costa County on Aug. 15, 1978.
Naso, a former commercial photographer, was also found guilty of the murders of Pamela Parsons, 38, and Tracy Tafoya, 31, whose bodies were found in Yuba County in September 1993 and August 1994, respectively.
You may read the complete Marin Independent Journal article here.
Naso lived in Piedmont with his wife and sons during the 1970s. You can read more about Naso's life in Piedmont here.You can read more about Naso's life in Piedmont here.
Bay City News Service contributed to this article.