He allegedly stole a scooter VG.
The charges against him have thus been expanded.
He has previously admitted assaulting his girlfriend. He has further said that he had problems with mental illness and drugs.
Raised in the royal house
His father is Morten Borg, who Crown Princess Mette-Marit lived with before she married Crown Prince Haakon.
Borg Høiby grew up in the Norwegian royal house, but lacks a title.
The criminal suspicions against him have become a major scandal in the country.