Marius Borg Høiby, the eldest son of Norwegian Crown Princess Mette-Marit, will remain in pretrial detention with an electronic ankle monitor for another four weeks, the Oslo District Court ruled on Monday. The 29-year-old will continue under house arrest at Skaugum, the royal estate, after the court rejected his request for release with a restraining order and location restrictions, according to the Norwegian press agency NTB .
The court cited a high risk of repeat offenses, siding with prosecutors who argued Høiby could commit further crimes if released. Høiby’s defense attorney, Petar Sekulic, told NTB the decision would be appealed, alleging procedural errors in the ruling. Sekulic said police had informed Høiby over the weekend that he would be released with a restraining order on Monday, but prosecutors instead sought continued detention. “This background is not mentioned at all in the district court’s decision,” Sekulic said, arguing the ruling contained “such significant flaws that it must be overturned” .
Høiby was convicted in June of two counts of rape under Norwegian law, as well as violence against an ex-girlfriend, and sentenced to four years in prison. The verdict is not yet final. He was initially charged on 40 counts and found guilty on 34, including two rapes—allegedly committed while the victims were asleep, with some acts filmed—and violence against two women, one of whom is his ex-girlfriend. Høiby has denied the rape allegations but admitted to some acts in a public statement in August 2024, acknowledging he had acted “after an argument and under the influence of alcohol and cocaine” .
The extended detention runs through Sept. 7. Høiby is permitted to leave home for medical appointments, family visits, or treatment, and must undergo regular drug testing. He has previously violated a contact ban with his ex-girlfriend, which prosecutors cited as part of the risk assessment. Sekulic argued Høiby’s compliance with unannounced drug tests and a treatment program should mitigate concerns, but the court ruled the risk of reoffending was tied to “ability, lifestyle, and risk factors” rather than intent .
Høiby was first arrested on Aug. 4, 2024, on suspicion of domestic violence and property damage at his ex-girlfriend’s residence. The appeals process for the detention decision will now move to the Court of Appeal, while a separate appeal of his conviction could take place next year. The current detention order remains in effect pending the appeal .
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