So, still some conflicting reports there.
If the shooter had the apartment in Aurora, Colorado, but the car had Tennessee tags, it could makes sense that one of his terrorist buddies might have road-tripped from Tenn (Murfreesboro?) to help with the attack.
Also, Aurora, CO is the home of the Zazi terrorist family:
Najibullah Zazi
http://en.wikipedia.org/wiki/Najibullah_Zazi