Transcript for Navy SEAL Chris Kyle Killed At Gun Range
now to the shocking killing of legendary s.E.A.L. Chris kyle. He was gun down at a shooting ra weekend. The man arrested was a troubled former marine chris was trying to help. Reporter: We're told that young suspect idolized the suspect, chris kyle. So many people did. An american hero who survived so much at war only to be gunned down here at home. I love the job. You know, the guy, the camaraderie. Reporter: Chris kyle knew the toll combat takes more than anyone. Served four tours in iraq. Killed more of the enemy than any sniper in u.S. Military history. He talked about the transition from war to home just weeks ago. You don't have an identity. You have to learn a whole new way to act. Reporter: He volunteered to help vets suffering from post traumatic stress disorder. Police believe he was trying to counsel eddie ray routh at a gun range over the weekend. The suspect's mother may have reached out to mr. Kyle to help her son. That might be why they were at the range for some type of therapy. Reporter: Shooting practice turned deadly saturday when the young former marine snapped. Turning his gun on the snirp he reportedly idolized. Allegedly shooting him and his friend, 35-year-old chad litt littlefield, at point blank range. He stole kyle's pickup truck and led police on chase. Tap. Rack. Reporter: Kyle could hit targets the length of 21 football fields way found success at home, too. He was a best-selling author. He writes about killing so many iraqi insurgents they nicknamed him the devil and put a $20,000 bounty on his head. He said the biggest accomplish lt was being a husband and father. 95% divorce rate on the teams. I made it out with my wife, so it's -- we're doing great now. Reporter: This morning, that young former marine, the suspect, is being held on $3 million bail. George, he'll be charged with two counts of capital murder. One for each of the men who were trying to help him.
This transcript has been automatically generated and may not be 100% accurate.