One of my points was that if she was alone when she left the beauty school, what could have happened that she would have stopped or exited the car so that someone could have taken advantage of her. In Washington you have to get out of your car and pump your own gas (in Oregon you are not allowed to). That would also explain why her debit card is not in her purse. When I get out to pump gas all I grab is my debit card and leave my purse on the seat. I know at some of the businesses the gas pumps are not close to the buildings (like Safeway, etc.) and if she stopped to get gas, someone could have easily pulled a gun or knife and forced her back into the car and to drive off.
I would be curious to also know where the purse was in the car. If it was in the back seat or on the floor of the passenger side, then that could also help tell whether the car was driven to Crescent Bar first. If she drove the car to Pitcher Canyon and left the car to go with someone else, the purse would probably be on the passenger seat next to her. Although if this was the case I don't think she would have left the purse. If she didn't want to take it with her she would have left it in the trunk so no one would break in and steal it.
I would be curious to also know where the purse was in the car. If it was in the back seat or on the floor of the passenger side, then that could also help tell whether the car was driven to Crescent Bar first. If she drove the car to Pitcher Canyon and left the car to go with someone else, the purse would probably be on the passenger seat next to her. Although if this was the case I don't think she would have left the purse. If she didn't want to take it with her she would have left it in the trunk so no one would break in and steal it.