Denial of qualified immunity for municipality policy authorizing police officers to surround a house, standing 5-7 feet from it before knocking on door to discuss a possible violation of the law, as the systematic invasion of the curtilage wasn't considered. Immunity upheld for individual officers upheld, given evolving caselaw.
http://www.opn.ca6.uscourts.gov/opinions.pdf/18a0199p-06.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.