Editing Use of force (section)

=== ''Kisela v. Hughes'' (2018) ===
Andrew Kisela, a Tucson police officer, shot Hughes less than a minute after arriving with other police officers to a report of a woman erratically hacking a tree with a knife. Hughes was in possession of a large kitchen knife, had taken steps towards her roommate, and had refused to drop the knife when repeatedly told to do so. After the shooting, the officers discovered that Hughes had a history of mental illness. All officers stated later that they believed Hughes to be a threat to the roommate. Hughes sued the officer claiming "excessive use of force" in violation of the 4th amendment. The Supreme Court ruled in favor of Officer Kisela, and stated that a reasonable officer is not required to foresee judicial decisions "that do not yet exist in instances where the requirements of the Fourth Amendment are far from obvious".<ref>Kisela v. Hughes :: 584 U.S. (2018)</ref>