1. A computer-implemented method to guide a dispatcher when communicating vocally with a caller via a communication device regarding an incident involving an active assailant and for dispatching an emergency dispatch response to the incident, the computer-implemented method comprising: presenting, on a dispatch center computer device, a pre-scripted interrogation comprising a plurality of preprogrammed inquiries for the dispatcher to ask the caller in order to systematically obtain a description of the incident involving the active assailant, wherein the description of the incident comprises caller responses to the plurality of preprogrammed inquiries, and wherein the preprogrammed inquiries of the pre-scripted interrogation include asking what happened, asking what type of weapons are involved, asking whether the caller can safely evacuate/leave the building/area; receiving, on the dispatch center computer device, dispatcher-entered input representative of caller responses to the preprogrammed inquiries of the pre-scripted interrogation; determining automatically on the dispatch center computer device a determinant value from one of a plurality of pre-established determinant values based on dispatcher-entered input representative of caller responses to one or more of the preprogrammed inquires; and generating an emergency dispatch response by emergency responders based on the determinant value.