A child sex offender caught living with a 15-year-old at her mother's home in Wahgunyah remains in custody.
The man, who can't be named, was in an off-and-on relationship plagued by violence with the teenager's mother.
He used Facebook to message and taunt the woman, made threats to burn her house down and kill her, smashed items at her home and left her living in fear.
The Wodonga Magistrates Court this week heard the man was "relentless" and the victim was struggling to cope.
The man was arrested in NSW and extradited on March 31, and remains in custody.
Magistrate Felicity Broughton was concerned that the child sex offender had been breaching his reporting obligations, including by living with a 15-year-old girl.
He has been on the sex offender registry since 2017 for sexual penetration of a person under 16.
Those on the registry must report information to police, including internet usage and address changes.
Police received information last October that the man had changed his Facebook details and was using Snapchat, and had moved from his home.
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The woman he was living with ended their relationship in March this year following an incident on January 14.
The man made threats while "off his head" and threw items at the victim's home, and yelled "I'm gonna kill you dog".
He breached a court order on March 12 by attending the woman's home while acting erratically and the following day messaged her to say "watch your house blow up in flames" followed by a suicide threat.
He also broke into a Wahgunyah home between March 6 and 14 and stole various items and shaved his head.
The court was told the man had been getting increasingly erratic, psychotic and paranoid.
Ms Broughton ordered a psychiatric assessment be conducted, despite the inmate yelling that he didn't want one.
He will return to court on October 4.
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