Any person who intentionally removes, causes the removal of, or detains the person's own child under the age of eighteen years outside this state with the intent to deny another person's rights in violation of an existing custody decree is guilty of a class C felony. Detaining the child outside this state in violation of the custody decree for more than seventy-two hours is prima facie evidence that the person charged intended to violate the custody decree at the time of removal.
N.D.C.C. § 12.1-18-05