Preparation for his attack. Rick lebenthal joins us from dallas with the latest. Hi, rick. Reporter good morning, even with a stifling heat index topping 100 degrees were still seeing memorials at the Dallas Police headquarters, with a steady stream of visitors of all races, creeds and colors leaving flowers and balloons and messages of love and support. And also sharing hugs with Dallas Police officers who are standing out here in front of Police Headquarters. Were now hold that micah johnson, that theyre confident he was the only shooter. He was apparently wounded before he was killed, leaving messages in his own blood in the parking garage where he was killed. He demanded a black hostage negotiators, and at times laughi laughing. Dallas Police Officers sent in a drone with johnson as you said supplemented his training at a dallas area gym that also trains Police Officers teaching personal protection techniques, in the search of johnsons home, they found a personal journal, where he