I'm pretty sure we're looking at two different women here. The one robbing the bank looks like a crackhead, and even though I can see some similarities, I can also see some differences..... ears, chin, weight, chest size and height....... nope, two different people.
There is an overabundance of blonde, overly tanned chicks in Arizona, and if they all put their hair up in a ponytail and put on a ball cap, about 90% of them would resemble the other one.
Now, back to this case. It would have been daylight at 5 A.M.. Their car was parked just off the main road and left with the doors unlocked. No sign of a struggle, no blood, teeth or hair left behind. The car being left sitting there unlocked, tells me that they left unexpectedly and without warning, no time to even lock it up. You don't leave your car unlocked in Phoenix or Tucson unless you don't want to ever see it again.
That simply means they didn't run out of gas or have car troubles, if they left it they would've locked it.
This was an abduction of some sort. It may have been brought on by road rage, but it seems more likely that they pulled over to help or aid someone, and were then led away at gunpoint. Both phones were disabled shortly afterwards. This seems staged and planned, I think they were flagged down and taken by someone they knew.
I just watched a video which talked about searches being organized from a local bar they liked to hang out at. I think that bar and the patrons therein may play into this. I'd like to know the last time they were there, and who was in there with them.