minutes. back behind me this theater remains a crime scene. investigators have been in and out of it all day today. as they try and figure out exactly what happened here last night. just before 7:30 thursday night, police say this man, 59-year-old john russel houser, stood up in a crowded movie theater armed with a handgun and opened fire. >> i could have been shot. like i didn't know where the shooter was. i don't know where he could have been. >> there was blood everywhere. that's when we realized what was going on. >> reporter: houser shot at least 13 rounds. witnesses say it was complete chaos. >> we just heard the alarm go off. then everybody just screaming to get out. people everywhere panicked, all panic. >> reporter: first responders raced to the scene, carrying out the wounded. this cell phone video shows an officer and two civilians coming to the aid of one victim. houser's car, a 1995 blue lincoln continental, with swapped-out license plates was parked right outside the theater exit leaving his keys on top of