tonight, we're on the scene of the deadly church shooting right here in texas. the chilling details just now emerging. authorities reviewing video from inside the church, saying the gunman, quote, came there to kill everybody in their building, period. 26 people dead. the victims, from just 18 months old to 77 years old. eight members of one family among the dead. authorities revealing the gunman had several webs, including and assault rifle. the fbi tonight with a possible motive, threatening text messages to a family member. the phone call to his father while trying to escape. and his discharge from the military, his violent past. also tonight, the heroes who jumped in to help. our interview with johnnie langendorff, who was driving the pickup truck chasing the suspect down the road. tonight, the fbi has just given him his phone back, and he