After the "Negro college" affair, Daggett continued to oppose the expansion of education for blacks. In 1833, Prudence Crandall admitted a black student to her female academy. The citizens first warned her, then withdrew their daughters from the school. Crandall reopened the school exclusively for black women. Canterbury passed a bill stipulating that the selectmen of the town had to approve any out-of-state students of color seeking an education. Crandall was arrested for violating this law. Chief Justice Daggett ruled in 1833 that, since free black people could not be U.S. citizens, they could be prevented from being educated.