Nancy Drew

My friend and neighbor, Liz, met me yesterday morning to do a bunch of running around. We started at the Goodwill, made our way to Asiana, and had a small disaster searching for blueberries in Skyland.
Eventually we found ourselves searching for blackberries in Arden on a plot of land that is used as a pipeline access. There were no blackberries (all fried up) but we did find something interesting.
Liz is taller than I am (most people are taller than I am) and she saw it first over a small hill.
"There's a car parked up there." she said, and I was bummed that someone had beat us to the blackberry patch. As we walked closer we saw the car had actually crashed into the brush with it's passenger side window rolled all the way down. Obviously the driver had climbed out through there. We called out, but no one was around. The car had been there since it had last rained pretty hard. Probably 2 or 3 days.
It looks like they drove in from Glenn Bridge Rd. (the same way we drove in, only we parked in a parking lot, and they, for some reason, drove down the dirt path) and got stuck in the mud. They tried to wedge themselves out with car mats and some sticks, but it slid into the bushes instead. Since the car door couldn't be opened from the drivers side, they climbed out through the window on the other side. I don't know why they didn't open the door. All of their stuff was still inside, minus a purse or anything like that. Mail on the dashboard, a cell phone charger, the usual trash and blanket (which looked horribly suspicious).
I didn't touch anything, but took pictures of the license plate and all around the car. A few yards away we also found a prescription bottle that had been crushed. I could make out a first name, and also that whatever drug it was caused drowsiness. I took pictures of that too and called the police to report it.
After that we sort of wandered home. I wonder what happened.