Brigham City, Utah v. Stuart, 126 S. Ct. 1943 (2006)
In a unanimous ruling of potential relevance to individuals involved in an altercation or a heated dispute in their home or while visiting another individual in that person's home, the United States Supreme Court ruled that police may enter a home without a warrant when they have an objectively reasonable basis for believing that an occupant is seriously injured or imminently threatened with such injury...