With decades of failed attempts at gun reform, some school officials say they are desperate for alternate solutions, including an AI system that uses human verification to better detect shooters. WATCH NIGHTLINE EPISODES: abc.go.com/shows/nightline ALSO AVAILABLE ON HULU: hulu.tv/2wSmSrZ #nightline #guncontrol #gunreform #schoolshooting #massshootings #technology #parenting #abcnews