A DANGEROUS sex fiend who was working as a police custody nurse when he attacked two women at knifepoint has been jailed for life.

Russell Miller eventually gave himself up and said of one victim: "It wasn't sexual. I just wanted to kill her. I want help to stop me wanting to kill people."

Passing a life sentence, a judge said the 36-year-old would have to serve four years and 66 days before being considered for parole.

"If you are ever released, it will be on terms that you are subject to licence for the rest of your life," he said.

Maidstone Crown Court heard that Miller committed the random attacks within nine months of each other while out jogging.

Both were near woods in North Dane Way, Lordswood. In the first, he sexually assaulted a teenage woman. The second woman, also a teenager, managed to escape before he could assault her.

Cairns Nelson, prosecuting, said the first victim was taking a shortcut to her boyfriend's home on the morning of September 17, 2004.

Miller, 36, stood over her with a kitchen knife. He ordered her to stop screaming and dragged her into the woods by her wrist.

The 18-year-old student pleaded with him not to hurt her. He replied: "I don't want to hurt you, I just want to touch your breast."

He stood behind her, lifted her T-shirt and told her to look to the ground. He exposed her left breast and rubbed it.

Miller told her to pull down her trousers and then indecently assaulted her further. He ordered her to walk 10 paces forward and not turn around.

She fled and contacted the police. Her attacker could not be identified at the time and on June 22 last year he struck again.

Mr Nelson said a 17-year-old waitress was on her way to work in the late afternoon, walking with her boyfriend. He returned home and she continued alone. As she entered a secluded pathway, she saw a man jogging.

Miller went up behind her and held a knife to her throat, warning: "If you scream or shout I will kill you."

She later became aware that he no longer had the knife at her throat. She kicked off her sandals and ran. She flagged down a passing car and the police were called.

Three days later, Miller went to Chatham police station and told the front counter officer: "I was the person that abducted the young girl on North Dane Way."

Mr Nelson said both victims were still traumatised by the attacks.

Miller, of Chamberlain Road, Chatham, admitted two charges of kidnap, sexual assault and committing an offence with intent to commit sexual assault.

Doctors described Miller, who was a custody nurse at Gravesend police station, as having an abnormal personality with sadistic fantasies. He told how he wanted to mutilate victims and drink their blood.

Judge Warwick McKinnon told Miller he had committed the offences in the most dreadful circumstances.

"You left your victims totally traumatised by your violation of them," he said. "It is clear you are a danger to women and likely to be in the forseeable future."

The judge imposed a determinate sentence of five years for the sexual assault charge and life for the remaining three offences.

Miller will remain on the sex offenders' register for life.