Fourth Amendment - police responding to a written request to remove a fellow occupant from the house informed the deft that they had a search warrant. Officer claims that this was to protect the woman who had filed the request. All agree that the subsequent search violated 4A - the question is whether the officer's actions qualify for the good faith exception to the Exclusionary Rule -- court holds emphatically that it doesn't.
http://www.ca4.uscourts.gov/Opinions/Published/144695.P.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.