A man who killed three men while defending his home has been gunned down in Mexico

A man who became a local hero after killing three armed men while defending his Ascension, Mexico, residence during an attempted home invasion has been killed - and authorities are investigating whether the two incidents are related. Alonzo Sandoval, 50, and his wife were killed at his auto parts store in Puerto Palomas de Villa, about two hours outside Ciudad Juarez, a spokesman with the Chihuahua state prosecutors' office said. The attempted home invasion took place on January 29, 2011. Sandoval lawfully defended his home with a gun that was legally registered to him, the prosecutors' office said.