Authorities investigating a double murderer who implied to a jury that he'd killed others have released 30 additional photos he took of men and women.

The release of the images comes more than two months after authorities called on the public to help find nearly 50 other women displayed in pictures William Richard Bradford, now on death row, snapped decades ago.

County sheriff's detectives said the newly discovered photos were given to them by Los Angeles police officials last month.

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The images — some subjects pictured in groups, others alone in form-fitting, revealing dresses — were posted in recent days on a Sheriff's Department Web site, said Sgt. Robert Taylor with the department's cold-case unit.

Click here to see some of the photos.

Also released were four photos of jewelry found near the Southern California desert burial site of an unidentified female victim, he said.

Bradford's attorney said her client was unaware of the new photos and questioned their origin.

"This was news to me," Darlene Ricker said. "I am really curious where these photos came from and where they've been for the last 20 years. I can tell you, I haven't had access to them or neither has Mr. Bradford."

In late July, authorities released photos he took years ago to try to determine whether the women were raped or killed between and 1975 and 1984. Since then, they received over 3,000 calls, e-mails and letters containing clues.

Of the 47 women pictured in nearly 50 photos, 28 have been identified by sheriff's investigators, who have traveled to Florida, Michigan, Rhode Island and many other states to conduct interviews, authorities have said.

Investigators have been hard pressed to identify any of the remaining 19 women in the last several weeks, and they hope more details about the women — jewelry, different angles of their profiles — will help yield clues from the public.

The photos had languished in an evidence room since being seized from Bradford's home in 1984, when he was arrested in the murders of Shari Miller, 21, whom he met in a bar, and Tracey Campbell, 15, a neighbor.

Authorities said Bradford, now 60, posed as a freelance photographer and shot photos of women he met at bars and elsewhere, luring them with promises to help their modeling careers. He was convicted in 1987 of first-degree murder in Miller and Campbell's killings.