Chandra saw the man by the door boot the hero before he got the gun away from the kid, then point the weapon at him.
“You left your goddamn phone on?”  Norm asked.  There were four that she could see, all with guns.  There were others in the back, doing something in the vault.  She just came in to check her balance before logging off.
“Sorry sir.  Something weird is going on outside.”
“Something weird?  You idiot.  You’re off the team.”  Norm never got a chance to fire.  The glass doors burst inward and the zombie was on him first.