>> reporter: the gunman opened fire, hitting and killing 67-year-old richard white and 64-year-old tony wallace. wallace's grandson was in the sanctuary at the time. >> the gunman just stood up and turned around to him. so probably like three feet away from my papa. it's kind of, like, heartbreaking, but sometimes you got to be strong about it and just keep on going. >> reporter: authorities say the shooter, seen here from a prior arrest, has had run-ins with law enforcement in the past. but they have not figured out a motive for the attack. kinnunen is described as a transient. but why he would take aim at innocent people at a church is a mystery. there were more than 200 people in the room at the time. at least six people drew their own weapons in the moments after the shooting. wilson trained the church's volunteer security team and no doubt saved countless more lives with his quick-thinking action. >> i see myself as doing what needed to be done to take out the evil threat. >> and marcus moore joins us