It looks like the parking lot is between the mall and the Walmart.They keep showing & talking about the mall but it sounds like this all started & went down in the parking lot at the Walmart. Video on YouBoob won't last long. Sadly shows some victims. You can also hear the courage and strength of a female who is in the background of the scene trying to provide aid. https://youtu.be/XpNB-DYBjtw