"Strong union protections allowed them to block their dismissals in arbitration." Bronx County District Attorney Darcel Clark investigated one facility that houses Willowbrook alumni but found insufficient evidence for abuse, witnesses not willing to come forward, and victims not able to speak for themselves. "It’s not whether or not it happened," she said. "It's what could we prove." Closure In 1975, a Willowbrook Consent Decree was signed that committed New York state to improve community placement for the now designated "Willowbrook Class." In 1983, the state of New York announced plans to close Willowbrook, which had been renamed the Staten Island Developmental Center in 1974. By the end of March 1986, the number of residents housed there had dwindled to 250, and the last children left the grounds on September 17, 1987. After the developmental center closed, the site became the focus of intense local debate about what should be done with the property. In 1989, a portion of the land was acquired by the city of New York, with the intent of using it to establish a new campus for the College of Staten Island, and the new campus opened at Willowbrook in 1993. This campus is the largest maintained by the City University of New York. Within the year, one of CSI's two other existing campuses, located in the Sunnyside neighborhood, was closed, renovated, and reopened in 1995 as the home of the new K-12 Michael J. Petrides School. The rest of Willowbrook's original property is still under the administration of the Office for People with Developmental Disabilities (OPWDD) —an agency of New York State— and houses the New York State Institute for Basic Research in Developmental Disabilities, and the Staten Island Developmental Disabilities Service Office. On February 25, 1987, the Federal Court approved the Willowbrook "1987 Stipulation," which set forth guidelines that required OMRDD (Office of Mental Retardation and Developmental Disabilities; renamed the Office for People With Developmental Disabilities, in July 2010) community placement for the "Willowbrook Class." The Willowbrook School was closed that year. All but about 150 of the former Willowbrook residents were moved to group homes by 1992. Significant members of the "Willowbrook Class" were not as intellectually limited as the term "developmental delay" would indicate. Some had cerebral palsy, a developmental disability that can be accompanied by varying degrees of intellectual impairment, and some members of this class were cognitively quite intact, yet