Notorious serial rapist Robert John Fardon says intensive sessions with a psychologist should allow him to be released back into the community.
In the Supreme Court in Brisbane on Thursday, Fardon was cross-examined for the first time on claims he is suitable to be released from an indefinite jail sentence on a strict supervision order.
Supreme Court Justice Debra Mullins will deliver her judgment on February 13.
If he is released, a strict supervision order could cover Fardon's relationships, alcohol and drug consumption and movements in public places, as well as his medical and psychiatric treatment.
Now aged 64, Fardon has spent all but five years of his adult life in jail. In 2003 he was the first person detained indefinitely under Queensland's Dangerous Prisoners (Sexual Offenders) Act 2003.
The hearing was told Fardon had undergone therapy with psychologist Nicholas Smith since June and Mr Smith believed the notorious sex offender could have been suffering from post traumatic stress disorder (PTSD).
Mr Smith said the PTSD symptoms were related to trauma Fardon experienced as a child, since about the age of seven.
Fardon told the court he would now abide by directions from Corrective Services officers if placed on a supervision order.
"I have had seven to eight months of weekly consulting with Mr Smith and his visits gave me insight into the issues which I have come to terms with and opened me to cooperate with programs," he said.
He said the brutal system at old Boggo Road prison, where he was jailed in 1979, had revived his childhood trauma but he was addressing those issues.
Fardon said if he was confronted with problems he would return home to wait for Mr Smith and then discuss them with him.
But Jonathon Horton SC said Queensland Attorney-General Jarrod Bleijie wanted Fardon to remain in jail to continue treatment.