CHICAGO -- The American Civil Liberties Union accuses Chicago police officers of racial profiling and an excessive use of its "stop and frisk" policy.
The ACLU says the police made more than 250,000 stops that did not lead to an arrest last summer.
That's four times more than stops done in New York.
The ACLU says police data shows blacks were stopped 72 percent of the time while whites were stopped nine percent of the time.
Police officials say they prohibit racial profiling, and officers are reacting to descriptions reported by residents and witnesses.