Vigilante home invader Tianna Lee Robb tells ACT Supreme Court of regret

Tianna Lee Robb, 22, fronted the ACT Supreme Court for a sentence hearing on Tuesday afternoon alongside one of her co-offenders, Jordan Connor Knight.

Both have pleaded guilty to aggravated burglary, while Knight, 23, has also admitted assault occasioning actual bodily harm.

The charges were laid over a violent home invasion in Spence in July last year.

On the morning in question, Robb and Knight were with others at the Wanderlust Gentleman's Club in Mitchell when the conversation turned to the victim.

The group believed this man had committed serious crimes and went to his home, where one of them remained outside and the remaining five burst into the house.

Knight held the victim's arms behind his back at one stage of the incident as another of the offenders, Dylan Crick, punched the man.

The 23-year-old later landed some blows himself.

Robb also invaded the home, but she did not join in the violence.

From the witness stand on Tuesday, she said she had initially gone to the house with the intention of having the victim come outside to "admit what he'd done".

The nature of what the victim was suspected of doing cannot be reported for legal reasons.

Robb told the court that once the group had broken into the victim's house, she saw one of her co-offenders, Marco Marzotto, push the man's pregnant sister.

She said she immediately apologised to this woman and her mother.

"I didn't know that it was going to go that far," she said.

Robb later told the court: "I wish that it never happened."

She said she had surrounded herself with "completely different people" since the episode and no longer associated with her co-offenders.

Robb also indicated she was due to start a new job in childcare next week, though she understood her sentence may impact on her ability to work in that industry.

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Her barrister, Duncan Berents, described Robb as being "a passive participant" in the home invasion.

He said her actions in apologising to the victim's family mid-offence demonstrated that she had "clear insight into the wrongfulness of her actions".

"At that moment [she] starts rehabilitating herself to the person your honour now sees," Mr Berents told Justice David Mossop.

Mr Berents said a sentence of imprisonment "could shatter [Robb's] future" and "destroy everything she's worked for".

But prosecutor Katrina Marson said one was warranted, noting Robb had entered the house and admitted having prior knowledge that the victim's mother and sister also lived there.

Knight's lawyer, Paul Edmonds, told the court the "just and appropriate" sentence for his client would be an intensive correction order.

He noted that Crick had received this sort of community-based jail term despite his role being more serious than the 23-year-old's.

Ms Marson said, however, that Crick's main "pursuit" had been to get the victim's phone, which he suspected contained evidence of the man's alleged crimes.

Knight had, she said, invaded the man's home "to act violently".

Justice Mossop said he would sentence both Robb and Knight on Thursday afternoon.

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