They haven't located him yet.
I wonder how many civvies are driving around Atlanta with their gun in their laps? If I were a big, black male, I'd stay inside for a while.
I can't believe that with cell phones and radio alerts, plus knowing what kind of car the guy is switching to because of the car jackings, that they can't locate the vehicles he's in.
If he's carjacking more cars, he must be abandoning the previous ones. It seems to me that would be making a trail to follow.
The traffic around Atlanta is so thick, I can understand how a helicopter couldn't locate him, but one the ground observers and drivers, especially those with cell phones seem to be the way to try to track the guy.