So she appears to have recognized the man "from the neighborhood". Indicating - to me - that this convenience store is in fact, in her neighborhood.
After screaming at the clerk and other patrons and getting no reaction (no one else called 911) it seems it would be rational to run back home and call from home, if she was in her neighborhood. How close to the convenience store did she actually live?
Well, it must be far, because it took her hours.