Once Jo made sure that the hostage could get out the door, she turned back to the carnage that was caused by the woman-who was she?
There would be time for questions after the fact, but for now Jo threw herself into the fray and jabbed yet another vampire with a syringe of dead man's blood.
Their numbers were whittling down at least. Jo did her best to avoid any of the chopped off limbs as she fought.