Colorado teen might have stopped school shooting before it happened 09/03/2015 2:48 pm PDT Comments KDVR via KDVR: NORTHGLENN, Colo. -- (KDVR) -- An alert teenager in Northglenn might have helped stop a school shooting before it happened 800 miles away in Phoenix. It was her smart thinking and actions after she caught sight of a menacing post on Snapchat. And it's why kids like it so much: It disappears seconds after being viewed. Or at least one student in Phoenix thought.Kaylee was using the app on Monday afternoon when a message popped up. "It said 'Planning the school shooting.' And it kinda freaked me out at first so I texted my mom," Kaylee said. "She said she got this picture and she texted it to me and asked 'Should I be concerned?' and my first response was yes," Kaylee's mother said. Kaylee was smart enough to take a screen shot of it before it disappeared, then she went to one of the school's deans to show him the picture. FULL STORY: Northglenn teen might have stopped school shooting before it happened - KDVR #Colorado #SocialMedia Waiting for your permission to load facebook comments.