Alyssa Mclaughlin News Today : Breaking News, Live Updates & Top Stories | Vimarsana

this is according to two senior law enforcement officials. authorities say that students were trapped inside the classroom with the gunman and repeatedly called 9-1-1 as local officers waited in the hallway for nearly an hour to take action. following days of confusion and misinformation, we are getting the clearest timeline yet. around 11:30 am, the shooter crashed his car. a 9-1-1 car was placed. shooting began outside of the school. within minutes, the scooter entered the school and fired off 100 rounds. by 12:03 pm, nearly 20 officers stood in a hallway outside of the classrooms....

>> this community, this country, grappling with the horror of this mass shooting that claimed so many young lives and the lives of the teachers who were trying to protect them. joining me now is national security and intelligence correspondent and msnbc correspondent, alyssa mclaughlin. can, i want to start with you. what more are we learning about the breakdown in the local police response to the mass shooting? >> good morning, alicia. after days of spewing misinformation, at texas state police officials gave, what appeared to buy be a clear timeline yesterday. so everyone understands, they a...