Will she be charged with murder.....one of the perps name was Muhammed...ya know what that means. This was in Arizona ....Lone Woman Shoots Home Invasion Suspect Dead When is deadly force for self defense in Arizona justified? Under ARS 13-405, the use of deadly force is sometimes permitted in Arizona. However, it’s limited to narrow circumstances. You can only use deadly force if you’re in reasonable fear of immediate serious physical injury or death. In order to lawfully use deadly force against someone, a reasonable person, in the defendant’s position, would need to believe that deadly force was immediately necessary to protect against potentially deadly force. That’s because self-defense must always be reasonable, proportional, and immediately necessary. Unless you’re faced with the immediate threat of serious physical injury or death, you cannot use deadly force.