Former Navy Seal and author Chris Kyle was killed in Texas Saturday, reportedly shot point-blank at a gun range while helping another soldier possibly recovering from post traumatic stress syndrome. Kyle was the author of the bestselling “American Sniper: The Autobiography the Most Lethal Sniper in U.S. Military History” and had earned the nickname of “the devil of Ramadi” by insurgents during his four terms in the Iraq War.

Eddie Ray Routh, 25, was charged on two counts of capital murder Sunday in connection to the shooting of Kyle, and his friend Chad Littlefield, who had reportedly took Routh to the shooting range. Kyle was advocate for veterans’ health and putting attention on the problem of post-traumatic stress disorder. Routh is a veteran who served in Iraq and Haiti, and officials say he is believed to be suffering from some “mental illness.”

A Department of Veterans Affairs report suggests as many as 30 percent of veterans returning from Iraq and Afghanistan have some sort of PTSD. Pete Hegseth is an Iraq veteran, CEO of Concerned Veterans For American, and former Executive Director of Vets For Freedom. Hegseth joined ‘Real News‘ Monday to discuss the tragic death of Kyle and mental health treatment for returning American soldiers: