Police said that the eldest son of Norway’s crown princess has been arrested just before his trial opens on charges including rape in a case that has been an embarrassment to the royal family. Police said Monday that Marius Borg Høiby was arrested on Sunday evening and is accused of assault, threats with a knife and violation of a restraining order. They requested four weeks' detention on grounds of risk of reoffending. He’s due to go on trial at the Oslo district court on Tuesday. The indictment includes 38 counts including rape, abuse in a close relationship against one former partner, acts of violence against another and transporting 3.5 kilograms or 7.7 pounds of marijuana.