When to shoot?, For law enforcement like Ferguson Police officer Darren Wilson who shot Michael Brown, the officer had his gun out and then, ten days later, also, the St.Louis Police officer who confronted a knife-wielding mentally ill man, had his gun out. The decision to shoot to kill made by these Police officers is all as a result of training received at the Police academy. Through this video some Police officers explained on why they react that fast, its all to save themselves from getting killed. Video source: http://www.bajaomoniyi.tv/2014/08/how-police-are-trained-to-use-deadly.html