The State of Western of Australia v Decke [No 3]

In the case of the State of Western Australia versus Decke, the Supreme Court of Western Australia was tasked with determining whether the respondent, who had been convicted of serious sex offences, remained a significant risk to the community. The state argued that Decke's propensity for reoffending necessitated his continued detention under the Sex Offenders (Management and Monitoring) Act 2005 (WA). The respondent, however, contended that he had made sufficient progress in rehabilitation and that he could be safely managed in the community under strict supervision.

The court needed to decide whether Decke constituted a serious danger to the community and whether it could be reasonably assumed that he would substantially comply with any supervision order that might be imposed. The legal principles that the court applied involved assessing Decke's past criminal history, his likelihood of reoffending, and the effectiveness of any proposed rehabilitation and supervision measures. The court had to weigh these factors to determine if continuing detention was necessary for public safety.

After examining the evidence and submissions, the court concluded that Decke continued to pose a serious risk to the community and that it could not be reasonably assured that he would comply with any supervision order. The court relied on Decke's history of non-compliance with previous supervision conditions, his failure to engage meaningfully with rehabilitation programs, and expert evidence suggesting a high risk of reoffending. Consequently, the court affirmed the Continuing Detention Order, holding that Decke should remain detained for the protection of the public.