AdvertisementReports: 'American Sniper' Chris Kyle Died While Trying To Help Fellow VeteranFebruary 04, 2013Mark MemmottfacebookEmailChris Kyle, retired Navy SEAL and bestselling author of the book American Sniper: The Autobiography of the Most Lethal Sniper in U.S. Military History, in April 2012. He was killed Saturday. (MCT /Landov)