The only way to safely and legally get her items is to file a motion in family court to hold him in contempt of court for violating the order, and in the process to ask that the court issue an order that the police or sheriff help her retrieve her items. She legally may do this herself, but hiring an attorney would be very helpful. If the value of the items does not justify the cost of an attorney, it may be best to simply forget about the items--they may not be worth continuing to engage with and possibly enraging such a volitile, unreasonable person.