Jackson v. Birmingham Bd. of Ed., Supreme Court of the United States, Justice O'Connor, March 29, 2005 [ruling that the Title IX gender equity law protects whistleblowers who claim discrimination by academic institutions]. Excerpt:

The regulations implementing Title IX clearly prohibit retaliation and have been on the books for nearly 30 years. More importantly, the Courts of Appeals that had considered the question at the time of the conduct at issue in this case all had already interpreted Title IX to cover retaliation. The Board could not have realistically supposed that, given this context, it remained free to retaliate against those who reported sex discrimination. A reasonable school board would realize that institutions covered by Title IX cannot cover up violations of that law by means of discriminatory retaliation.

Read the full text of the opinion here [PDF]. Reported in JURIST's Paper Chase here.