leaders of the investigations about exactly what happened to get down to the very second of exactly what happened with 100% accuracy. >> the governor's press conference coming after the texas department of public safety said police were wrong in waiting to go in and eliminated an active shooter after he had started killing students and eaters. >> it was a wrong decision. there's no excuse for that. texas embraces active shooter training, active shooter certification. every officer lines up, stacks up, goes and finds where those rounds are being fired and keeps shooting into the subject is dead, period. >> the decision to back down from an active shooter was, according to officials, made by the school districts chief of police. >> the commander of the time it was believed that in fact it was a barricaded subject. at the time he there were no kids at risk. >> the initial comes after he laid out the timeline that day. 11:27 am a teacher, he said,