Marius Borg Hoiby has no royal title or duties, but as the stepson of the heir to the throne, his arrest has cast a cloud over Norway’s popular royal family.

The son of Norwegian Crown Princess Mette-Marit was arrested for allegedly raping a woman in Oslo — his third arrest in a matter of months, according to police.

Crown Prince Haakon said the police and judiciary must be allowed to do their jobs as they investigate a list of allegations, including rape, against Marius Borg Hoiby, his wife's son from a previous relationship.