You’d be surprised how many people say “It’s not mine. I didn’t know that was there” when they are caught with something they shouldn’t have.
If you are driving around in a car that isn’t your car, don’t be surprised if the 9/10’s rule doesn’t apply.
And I don’t believe it should. (9/10s)
The case you mentioned though, there’s no traceable owner.
It just seems wrong for the police to simply say, okay, that cash is now mine.