Denial of qualified immunity, as circuit precedent involving illicit videotaping of fellow officers and inappropriate physical contact with arrestees clearly established a due process right to bodily integrity that was offended by the manner of the assault investigation.
http://www2.ca3.uscourts.gov/opinarch/173027p.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.