International institutions have outlined when and where law enforcement agents might have the availability of lethal force at their disposal. The International Association of Chiefs of Police have 'Model Policies' which incorporate various pieces of information from leading sources. One of these model policies states that law enforcement agents will engage in reasonable necessary force to efficiently bring a scenario to a conclusion, giving specific thought to both the safety of themselves and other civilians. Law enforcement officers are given the prerogative to engage in department-approved methods to safely bring a conclusion to a scenario and are also given the ability to use issued equipment to resolve issues in scenarios where they are required to protect themselves or others from damage, to bring resistant individuals under control, or to safely conclude unlawful incidents. There is no mention as to what "reasonably necessary" should be interpreted as meaning, but there is reference made to the reasonable man method of determining how one should approach a scenario. However, it has been highlighted through events such as the killing of Michael Brown by Darren Wilson in Ferguson, Missouri, which resulted in public unrest, that there is confusion and debate surrounding the use of firearms and lethal force. The 'Procedure for the Use of Firearms' section provides the process through which law enforcement agents must progress when using firearms. It states that they must identify themselves as a law enforcement agent, issue a clear warning, and give an adequate amount of time for response (providing that time would not likely result in harm being done to the agent or other civilians) before deadly force can be used within the bounds of international law.