West County SWAT’s BearCat rolls up to the west entrance of Westminster Mall with team members armed and ready. They station themselves around the front entrance, gathering as much intel as possible. “Do you see anyone?” one of them asks. What they do know: There’s an active shooter somewhere in the mall. They enter the mall as a group, some walking backward, covering themselves on all sides from prospective fire. The team walks deeper into the building, as mall music plays in the background. Screams for help can be heard coming from somewhere in the mall. “Got movement upstairs,” says…