A Las Vegas police officer who shot and killed an unarmed and disabled veteran will not face criminal charges. Officer Jesus Arevalo shot and killed Stanley LaVon Gibson, a Gulf War veteran, with an assault-style rifle in December 2011, while Gibson was locked inside his own car. Gibson’s widow has filed a federal lawsuit accusing the police of civil rights violations against her husband, who was African American. But Clark County District Attorney Steven Wolfson concluded the officer thought he was acting in self-defense after he heard a sound that turned out to be another police officer firing a beanbag shotgun to break Gibson’s car window.