Just over 10 years ago, in January of 2002, Nassau County was short on the cash needed to maintain its various properties, from courthouses to administrative office. Then-County Executive Thomas R. Suozzi set out to consolidate the county’s holdings, devising a plan that included the sale of a 25-acre parcel in Garden City, a village of just over 21,000 residents in central Long Island. That decision set of a chain of events that is still playing out in court, where Garden City officials face allegations that racial discrimination caused them to disallow the development of multi-family rental buildings on the site. The case is expected to go to trial in district court this summer. The case highlights some of the challenge that have faced both developers who want to target young, elderly and blue-collar residents in suburban New York, and policymakers who seek to bring racial and economic diversity to some of the area’s whitest, most affluent communities.