we need light news today. first, virginia tech s campus plunged into panic when a gunman reopened the wounds from the april, 2007, massacre. we re looking for answers about what triggered this shooting. mark kelly joins us live from the campus in blacksburg with the very latest on this incident. good morning to you, mark. reporter: good morning, rob. we found out here the slain police officer has been identified. derek crousse, a u.s. army veteran, and the second victim the shooter. police believe he turned the gun on himself. [ siren ] reporter: it was chillingly familiar. the virginia tech campus on lockdown as police hunted for a gunman. shortly after noon, a campus police officer pulled over a vehicle in the coliseum parking lot. during that traffic stop the officer was shot and killed. and there were witnesses to that incident. reporter: juliet fielding was one of them. they opened his car door. when they opened it. he just fell out toward the ground. sorry. and