It's possible she was abducted from her car, leaving her purse behind. Later someone could have seen the purse and removed the wallet, taking the credit cards and cash and discarding the wallet.
Where are her car keys? As far as I know, her keys were not found.
If her car keys were left in the car, unlocked with purse present, that's a golden opportunity for grand theft auto. But the perp didn't want that.
Those keys are missing, and they are missing for a reason.
That wallet with ID was placed/thrown there for a reason.
The proximity of the wallet and car, in my opinion, was a thought out plan.
Why would a person steal her wallet out of the car, then drop it in that location? If there were cameras available in that particular area, that would alert LE to the fact of this perp on camera just stole Susan Jacobson's wallet, as that is pretty Dumb to leave her ID present with the car in the parking lot. That would also mean breaking and entering a vehicle (although unlocked) as well.
Why didn't the perp just drive off with the car? Who is to say that she even drove herself to the shopping center?
It's not the car they wanted.
And the credit cards. They could have been taken out of the wallet at home or elsewhere. Just because there were no credit cards in the wallet does not mean that they were there previously. It is an assumption that those cards were there that morning and stolen. Just like it is an assumption that those cards weren't in her wallet to begin with. The same with the cash. If she drove herself to the shopping center and wanted to purchase items, she would have to do so with cards or cash, (if she drove herself there).
There just isn't Enough Information available to the public.
What LE knows, they are Not releasing, like where the car was parked, how many doors were unlocked, where was her purse, how was the seat positioned, etc, what do the VIDEOS show? Who is on the video?? Who is Not on the video??
IMOO.