HESSTON, Kan. — A man who stormed into a Kansas factory and shot 14 people, killing three, had just been served with a protective order involving a former girlfriend that probably set off the attack, authorities said Friday. The assault at the Excel Industries lawnmower-parts plant in the small town of Hesston ended when the police chief killed the gunman in a shootout. Harvey County Sheriff T. Walton described the officer as a "tremendous hero" because 200 or 300 people were still in the factory and the "shooter wasn't done by any means."