HONOLULU (AP) — Hawaii could become the first state in the United States to enter gun owners into an FBI database that will automatically notify police if an island resident is arrested anywhere else in the country. Most people entered in the "Rap Back" database elsewhere in the U.S. are those in "positions of trust," such as school teachers and bus drivers, said Stephen Fischer of the FBI's Criminal Justice Information Services Division. Recent Supreme Court rulings have clarified states' ability to regulate gun sales, said David Levine, a law professor at the University of California, Hastings College of the Law. Right now, Hawaii gun owners undergo a background check only when they register a gun, so police have no way of knowing if they're disqualified from owning a gun in the future unless they try to register a new firearm.