I have a couple of questions..
first what is she holding? It almost looks like a ketchup bottle but I highly doubt that. I wonder if they have any pictures of her car at the gas station.
2. Do we know she bought gas? Or did she buy something inside?
3. I know they said she left her bag but I can't remember - did she take her phone with her? Pings would be a great help. I think I remember seeing she didn't though. What about a wallet?
4. Why are they focusing on falls lake?
Regarding Q4: per the media reports, "Today her friends rented a helicopter to search falls lake for her and her car." https://www.facebook.com/wralAmandaLamb/posts/10155180290795813
I dont know whether LE is searching in the Falls Lake area (very large area) or not. Apparently Allison's friends rented the chopper.
Allison's residence was very near Falls Lake, and the gas station where she was last seen is also near it.
Bottom left white dot: RDU Airport
Red flag: AC residence (address blocked by me) in Raleigh - 18 miles from RDU
Black dot: gas station in Wake Forest - 6 miles from residence