Despite serving all but a month of a six-year sentence, the Parole Board noted 24-year-old Regan Philip Burrell was still assessed as posing a high risk of future violence and an above-average likelihood of sexual reoffending.
Panel convener Judge Gus Andree Wiltens also said Burrell was now an associate of the Black Power gang.
At sentencing in 2019, the Dunedin District Court heard he targeted two 12-year-old girls and a 13-year-old.
Burrell locked one of the victims in the back of his vehicle after convincing her to meet him in a carpark and threatened to kill her dogs if she told anyone about the sexual assault.
Burrell, who was a teen at the time of his crimes, contacted the girls online before luring them into meetings.
One of them only met up with him after he repeatedly blackmailed her, threatening to distribute nude photos to her friends and family if she did not comply with his demands.
Only months after sentencing, while in prison, he was awaiting dinner in his cell when he called out to another inmate.
When the man arrived, Burrell doused him with boiling water.
He later explained he did it because he believed the man was a "snitch".
At a parole hearing last year, a psychologist reported the inmate had completed a sex-offender course, but to little effect.
"Comments in the report from him are said to indicate a [continued] callous disregard for his victims and a view of them as sexual objects," the board heard.
Burrell had started individual work with a psychologist in September and that could continue after his release last week, Judge Andree Wiltens said.
Among the 20 special release conditions, which will run until May next year, were:
- To attend any treatment as directed by Probation.
- Not to use alcohol or non-prescription drugs.
- Not to possess any internet-capable device.
- To disclose details of any intimate relationships.
- Not to associate with under-16s.
- Not to communicate with any Black Power associate.
- Not to contact victims.
- To submit to electronic monitoring.
- Not to enter Dunedin.
- To live at a Christchurch address and abide by a 10pm-6am curfew.