LOS ANGELES -- In the month since they released the photos of nearly 50 girls and women taken by a suspected serial killer, authorities said they've been flooded by more than 1,000 calls and have received at least one promising lead in Florida.

Los Angeles County Sheriff's detectives investigating whether the women were raped or killed between 1975 and 1984 by William Richard Bradford posted the photographs last month in hope that the public could help account for them.

Bradford is on death row at San Quentin State Prison for murdering two aspiring models in the early 1980s. The photographs were seized from his home in 1984 and sat untouched for years until a cold-case detective decided to take a second look earlier this year.

Of the 47 women in 54 photos, only 23 have been positively identified as alive, said Sheriff's Capt. Ray Peavy.

One lead that investigators are working on is the case of a missing Florida woman who bears a strong resemblance to a young woman in the photographs.

Darlene Ann Webb disappeared Jan. 22, 1983, after leaving a Daytona Beach bar. Her family has told sheriff's officials that Webb looks very much like a woman in one of the photos.

On Thursday, WKMG-TV in Orlando showed a the photo to Webb's mother, Frances, who said the photo looks like Darlene .

"It is a very close resemblance," Frances Webb said. "From the nose up, it is the spitting image."

Bradford, who had lived in Florida at some point, was residing in Los Angeles when Webb disappeared, officials said.

One of the women who came forward was actress Eva La Rue, a star on the CBS drama "CSI: Miami" who told authorities that Bradford took photos of her and her sister, Nika, two decades ago.

In several instances, family members contacted authorities convinced their loved ones were photographed by Bradford and later killed. Further investigation found that their identities didn't match.

"The first thing you usually know as a detective is who the victim is. But here that is last thing we are going to know," Peavy said.

Authorities said Bradford, now 60, posed as a freelance photographer and took pictures of women he met at bars and elsewhere, luring them with promises to help their modeling careers.

Bradford has denied killing anyone and is appealing his conviction and death sentence. Even though he was a freelance photographer and the pictures were seized while in his possession, he may not have taken them, his attorney contended.