The
majority opinion by Justice Brennan noted that the South Carolina trespass statute criminalized entry upon the lands of another after notice from an owner or tenant prohibiting such entry. The South Carolina Supreme Court, in upholding the convictions, had construed the statute as also covering the act of remaining on the premises of another after receiving notice to leave, a construction that had been adopted in another case in 1961. The Court stated that a judicial construction that has the effect of broadening the activities that constitute a crime and is applied retroactively operates precisely like an ex post facto law. Since an ex post facto application of criminal statutes violates the Due Process Clause of the Fourteenth Amendment, the Court reversed the convictions. The concurring opinions of Justice Goldberg and Justice Douglas stated simply that they would reverse based upon their opinions in
Bell v. Maryland, 378 U.S. 226 (1964), another case involving a sit-in demonstration by African-American students that was announced the same day as
Bouie. The dissenting opinion by Justice Black argued that the conduct of remaining after being told to leave was understood to violate the South Carolina trespass statute, and
Bell stated that the Fourteenth Amendment did not require an owner of a restaurant to serve customers. ==Critical response==