Tangreti v. Bachmann
Granting qualified immunity to prison supervisor for sexual abuse of prisoner by three guards; court holds there is no “special rule” for supervisory liability, plaintiff must plead and prove that “each Government-official defendant, through the official’s own individual actions, has violated the Constitution,” citing Iqbal; that means the claim against the supervisor must satisfy the elements of the constitutional claim; supervisor here entitled to qualified immunity because record did not establish that supervisor had required subjective knowledge that plaintiff was at a substant