Michigan v. Fisher, 558 U.S. 45 (Dec. 7, 2009)

An officer’s entry into a home without a warrant was reasonable under the emergency aid doctrine. Responding to a report of a disturbance, a couple directed officers to a house where a man was "going crazy." A pickup in the driveway had a smashed front, there were damaged fence posts along the side of the property, and the home had three broken windows, with the glass still on the ground outside. The officers saw blood on the pickup and on clothes inside the truck, as well as on one of the doors to the house. They could see the defendant screaming and throwing things inside the home. The back door was locked and a couch blocked the front door. The Court concluded that it would be objectively reasonable to believe that the defendant’s projectiles might have a human target (such as a spouse or a child), or that the defendant would hurt himself in the course of his rage.