A convicted rapist has been sentenced to an extra two-and-a-half years in jail after admitting he had a sexual relationship with an underage girl.
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Robert Glen Sirl, 48, was already serving an 11-year jail term after two ACT Supreme Court trials last year.
One jury found him guilty of raping a woman and recklessly inflicting grievous bodily harm, while another convicted him of maintaining a sexual relationship with a young person.
On Thursday, the ACT Supreme Court heard there would be appeals.
But in a third case, Sirl pleaded guilty on Thursday to maintaining a sexual relationship with a different underage girl between August and October in 2018.
Chief Justice Helen Murrell said Sirl first met this teenager when the girl was "couchsurfing".
They exchanged phone numbers and started spending time together.
The judge said the girl moved in with Sirl at a caravan park and they had frequent sex, without using a condom. They also smoked ice and cannabis together.
Chief Justice Murrell said Sirl took advantage of the girl's homelessness and by giving her a place to live and providing her with drugs, he made the teenager dependent on him.
The girl initially lied to Sirl about her age, but when he learned she was under the age of consent, he continued the relationship.
Chief Justice Murrell said that at times during his relationship with the girl Sirl had said things like: "This is wrong, you're too young".
Towards the end of the relationship Sirl had used sex toys on the girl in ways that made her feel uncomfortable.
The judge said when the girl objected to this, Sirl's response had been to accuse the teenager of cheating on him.
Chief Justice Murrell said Sirl had a tendency to exploit the age and vulnerability of his victims.
"His sexual exploitation of [the girl] was not an isolated incident of him seeking sexual gratification from one person," the judge said.
Chief Justice Murrell said the girl had initially been reluctant to speak to police about her relationship with Sirl because of the affection she felt for him, but eventually gave an interview in January last year.
The judge increased Sirl's total jail sentence, which was backdated to start in October 2018, by two years and six months.
This took Sirl's prison term to 13 years and six months.
Sirl's previous non-parole period was also extended by four months, meaning he must now have served at least eight years behind bars before being eligible for release in October 2026.