Title VII, S1983 Conspiracy
Denial of sought-for promotion is an adverse employment action where the change would have been marked by a material change in working conditions.
Conspiracy verdict upheld where the jury might have inferred that knowledge of the discrimination demonstrated active complicity in the discrimination.
http://media.ca8.uscourts.gov/opndir/16/01/143696P.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.