Former FBI official on school shootings in US HD

The gunman who killed nine people at Umpqua Community College in Roseburg and wounded another 7 was identified as Chris Harper-Mercer. The 26-year-old was a student at the college. He was enrolled in the writing class where the shooting took place. Why did the young man choose this path and how can such tragedies be prevented, let’s find what a former FBI official says. Subscribe to us on Youtube: https://www.youtube.com/user/CCTVNEWSbeijing Download for IOS: https://itunes.apple.com/us/app/cctvnews-app/id922456579?l=zh&ls=1&mt=8 Download for Android: https://play.google.com/store/apps/details?id=com.imib.cctv Follow us on: Facebook: https://www.facebook.com/cctvnewschina Twitter: https://twitter.com/CCTVNEWS Google+: https://plus.google.com/+CCTVNEWSbeijing Tumblr: http://cctvnews.tumblr.com/ Weibo: http://weibo.com/cctvnewsbeijing