 He worked with Thurgood Marshall on the Ada Lois Sipuel challenge to segregation in the law school of the University of Oklahoma; consequently, the Supreme Court ruled in 1948, in Sipuel v. Board of Regents of Univ.of Okla., that barring Sipuel from the school was unconstitutional.In the late 1950s, Watts and Oklahoma State Senator Gene Stipe entered a restaurant.