enforcement never experienced an attack like this. i was right in this corner right here, which is the closest spot inside the venue too. reporter: when the gunfire erupted the chief dropped to the ground and bullet fragment sliced his finger. that s probably what saved my life. when that hit, then i knew i was in the wrong spot. you he and a group of others raced and recorded this chilling video. bullets were flying everywhere, it reminded me of old westerns where the outlaw tells somebody, okay dance and starts shooting the ground around them. you could watch the rounds popping anywhere. reporter: he knew the only way to survive was run as they tried to escape, the killer took aim at them again. i could hear it hitting the pavement behind us and you could feel some of the asphalt kicking