ANTIOCH, Calif. AP – As more and more black renters began moving into this mostly white San Francisco Bay Area suburb a few years ago, neighbors started complaining about loud parties, mean pit bulls, blaring car radios, prostitution, drug dealing and muggings of schoolchildren.

In 2006, as the influx reached its peak, the police department formed a special crime-fighting unit to deal with the complaints, and authorities began cracking down on tenants in federally subsidized housing.