Marius Borg Høiby, son of Norway's crown princess, is suspected of multiple offenses including three alleged rapes.
Police in Norway concluded a ten-month investigation, involving numerous witness interviews and extensive digital evidence review.
The case has been handed to prosecutors to determine whether to file formal charges against the 28-year-old Høiby.
Høiby's lawyer confirms his client is taking the accusations seriously but denies most of the allegations, particularly those involving sexual abuse.