assigning white students to nearby underutilized black schools, while simultaneously purchasing closed white schools and busing black students past open white schools with vacant seats. In accordance with the Racial Imbalance Act, the School Committee would be required to bus 17,000 to 18,000 students the following September (Phase I) and to formulate a desegregation plan for the 1975–1976 school year by December 16 (Phase II). On September 12, 1974, 79 of 80 schools were bused without incident (with South Boston High School being the lone exception). Twenty minutes after Judge Garrity's deadline for submitting the Phase II plan expired on December 16, 1974, the School Committee voted to reject the desegregation plan proposed by the department's Educational Planning Center. On December 18, Garrity summoned all five Boston School Committee members to court, held three of the members to be in contempt of court on December 27, and told the members on December 30 that he would purge their contempt holdings if they voted to authorize submission of a Phase II plan by January 7. On January 7, 1975, the School Committee directed school department planners to file a voluntary-only busing proposal with the court. On May 10, 1975, the Massachusetts U.S. District Court announced a Phase II plan requiring 24,000 students to be bused that was formulated by a four-member committee consisting of former Massachusetts Supreme Judicial Court Justice Jacob Spiegel, former U.S. Education Commissioner Francis Keppel, Harvard Graduate School of Education professor Charles V. Willie, and former Massachusetts Attorney General Edward J. McCormack that was formed by Judge Garrity the previous February. On June 14, the U.S. Supreme Court under Chief Justice Warren E. Burger (1969–1986) unanimously declined to review the School Committee's appeal of the Phase II plan. In December 1975, Judge Garrity ordered South Boston High School put under federal receivership. In December 1982, Judge Garrity transferred responsibility for monitoring of compliance to the State Board for the subsequent two years, and in September 1985, Judge Garrity issued his final orders returning jurisdiction of the schools to the School Committee. In May 1990, Judge Garrity delivered his final judgment in Morgan v. Hennigan, formally closing the original case. From September 1974 through the fall of 1976, at least 40 riots occurred in the city (including many interracial riots), and incidents of interracial violence in Boston would continue from November 1977 through at least 1993. On June 21,