The Thurgood Marshall School of Law (TMSL) is an ABA-accredited law school in Houston, in the U.S. state of Texas, that awards J.D. (Doctor of Jurisprudence). It is part of Texas Southern University. Its history can be traced back to a 1946 lawsuit implicating protections for racial minorities under the U.S. Constitution, Sweatt v. Painter, brought by Heman M. Sweatt, and tried by Thurgood Marshall. Thurgood Marshall School of Law has been consistently ranked number one in achieving diversification in its student body.