Topic: Des Moines Police will be presenting on "What to do if you have an active shooter in the workplace" An active shooter/ hostile intruder is an individual actively engaged in killing or attempting to kill people in a confined and populated area by any means including but not limited to firearms (most frequently used), bladed weapons, vehicles, or any tool that in the circumstance in which it is used constitutes deadly physical force. In most cases, there is no pattern or method to their selection of victims. Most active shooter situations are unpredictable, evolve quickly, and are over within minutes. Don't be unprepared for the worst case scenario. There are things you can do!