Los Angeles ? Investigators are trying to find about 50 women who were photographed decades ago by a man now on death row for murdering two aspiring models in the early 1980s, authorities said Tuesday.

Detectives are investigating whether the women were raped or killed between 1975 and 1984 by William Richard Bradford, said Los Angeles County sheriff’s officials, who posted photos of the women on a department Web site in the hope that the public could help account for them.

One, No. 28 on the display, was identified as Donnalee Campbell Duhamel, whose decapitated body was found in a Malibu canyon in 1978, a few days after she met Bradford at a bar, said sheriff’s Capt. Ray Peavy.

“Some of these women we … identified,” Peavy said. “Several of them were his wives, ex-wives. But for the most part the majority of these folks we do not know who they are, who they were.”

Other local law enforcement agencies also were looking into possible connections to unsolved homicide cases from 1975 and 1982.

The Santa Monica Police Department was investigating whether Bradford was involved in the slaying of Patricia Dulong, 33, who was last seen there. And the Los Angeles Police Department may have linked him to the death of 23-year-old Mischa Stewart, Peavy said.