This is the only thing I could find of Stacy Errickson, Marcel Williams' murder victim, on the net.
Shed your tears for Mary Phillips & Stacy Errickson
http://www.mantecabulletin.com/section/38/article/143226
Jones raped and then murdered Phillips during a botched robbery at an accounting office in 1995. He also beat Phillips 11 year-old daughter so savagely that law enforcement officials were stunned when she suddenly moved when crime scene photos were being taken.
Errickson a 22-year-old mother of two had stopped for gas in 1994 when Williams forced his way into her car at gunpoint, robbed her, raped her and then dumped her body in a shallow grave. Errickson was not Williams first victim. He had attacked women previously.