Sentenced: The 'most prolific' serial killer in U.S. history is Jewish

[Born Jacob Berger, He is a graduate of UCLA school of Fine Arts, has attended New York University under the alias "John Berger", and has studied film under Roman Polanski. Behind 130 murders?]

Police have released more than 100 photographs of unidentified women and girls amid fears they could be the victims of America's worst ever serial killer.

The pictures were taken by Rodney Alcala, who was sentenced to death by lethal injection for the savage murders of a 12-year-old girl and four women.

However, the 66-year-old has admitted killing another 30 women in the 1970s and police believe there could be many more victims.

They have already linked him to the deaths of two Seattle teenagers aged 13 and 17, and a 19-year-old who vanished from the same area, as well as two women in New York and several more in Los Angeles.

The photos were discovered hidden in a storage locker in Seattle, Washington, where Alcala, an amateur photographer, kept his possessions before his arrest.

Although many of the 1,000 pictures were innocent poses in a park or on the beach, some women had stripped off for the camera.

Police believe that Alcala - who is known in the U.S. as the Dating Game Killer because he once appeared on America's version of Blind Date - kept the photographs as sick souvenirs of his victims.

The women in the photos range in age from schoolgirls to women in their 20s and 30s, and are believed to come from across the U.S. Two of the pictures may have been taken after the women were murdered.

Prosecutor Matt Murphy said: 'We'd like to locate the women in these pictures. Did they simply pose for a serial killer or did they become victims of his sadistic, murderous pattern?

'He committed unspeakable acts of horror. He gets off on the infliction of pain on other people. He's an evil monster who knows what he is doing is wrong and doesn't care.'

Detective Claiff Shepard said: 'He's right up somewhere below Hitler and right around Ted Bundy. It is not humane what he does to these victims. It is tortuous.'

Alcala - who defended himself during his trial - preyed on women and girls by offering to take their photographs.

He then raped his victims, strangled them until they were unconscious before reviving them and killing them.

The photographer, who is said to have a genius IQ of 160, often boasted of his winning an episode of the American version of Blind Date.

However, the woman who chose him later cancelled their date because she found him 'too creepy'. More

Rodney Alcala Killed Victims Because "He Enjoyed It"

The "Dating Game" killer