video disturbing video of the shooter entering the school, and we have new information just in to cnn that the shooter had actually reached out to someone on instagram moments before. also this a crucial witness in the donald trump hush money case testifies again. david pecker, the former publisher of the national inquiry appeared before the grand jury. for the second time, those jurors set to meet again tomorrow. and at least 39 people have been killed in a fire that swept through a migrant detention center in mexico. we have new details coming in. but we start this morning, tracking the several overnight developments as we are getting new details out of nashville, where that school shooting took place, including this surveillance video from inside the school and new information about the minutes leading up to the murders of 39 year old children and three school staff members. i want you to know that what you re about to see is disturbing. this is the shooter pulling into th