A man who raped a woman during a home invasion, and as a juvenile killed a pregnant mother and her baby in a high-speed crash, has been locked up indefinitely under WA's dangerous sex offenders laws.
Kingsley Arnold Pickett was aged 14 when he caused the crash that killed Margaret Blurton and her one-year-old son Shane on Boxing Day in 1991.
Pickett was jailed in 2000 for the home invasion and at the time was already serving a separate sentence.
The judge made an indefinite imprisonment order, but Pickett took his case to the WA Court of Appeal and won.
Pickett was re-sentenced to a total effective sentence of 14 years and seven months in prison, but remained behind bars pending an application under the Dangerous Sexual Offenders Act.
On Wednesday, Supreme Court Justice Jennifer Smith ruled Pickett, now aged 42, should remain locked up.
"I find that Mr Pickett is a serious danger to the community ... and that an order should be made that Mr Pickett be detained in custody for an indefinite term for control, care or treatment," she said.
"I am not satisfied, on the balance of probabilities, that Mr Pickett will substantially comply with the standard conditions of a supervision order."
Justice Smith noted Pickett had only committed one serious sexual offence, but said he had a long history of committing violent offences under the influence of drugs, which could expose women to serious sexual offences.
If Pickett addressed his treatment needs, he should have good prospects to be released on a supervision order in the future, Justice Smith said.
"Perhaps he can now see that there is some light in front of him if he is prepared to do the work to make the changes in his patterns of behaviour that are required of him," she said.