S1983 / use of force
Qualified immunity for taser use against nonviolent resistence by arrestee (securing himself to a stop sign).
Opinion is precedential as to use of force in future, though, holding that stationary and nonviolent resistance by mentally ill arrestee not deemed a threat to others is excessive.
Concur in part: Not a 4A violation - overdeterrence.
http://www.ca4.uscourts.gov/Opinions/Published/151191.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.