>> brian nichols is armed and on the run. a major manhunt begins. >> police now on a massive manhunt for 33-year-old brian nichols. >> he goes into an underground parking garage where he carjacks a deputy's car. he'd later carjack at least five others. >> he would put a gun to them and order them out of their vehicles, take their vehicle, switch vehicles, and continue to switch vehicles. >> one of the cars nichols steals is a green honda that belongs to this reporter. nichols hits him over the head with a gun. >> i think i'm extremely lucky to escape without being shot or thrown in the trunk. >> this parking garage security camera captures nichols casually walking down the stairs, apparently wearing o'brien's blazer. >> the story that we're covering for you, a major manhunt under way in atlanta. >> the search for brian nichols is broadcast all day, and it appears there's no sign of the horror ending anytime soon.