A city law and the terms of a settlement agreement require NYPD "to release to the City Council, four times a year, basic data about the people who are stopped and questioned by officers, and the reasons for such encounters."

But until yesterday, it had been a year since the department reported its stop-and-frisk activity, and those numbers dated from a three-month period ending in September 2003. In the meantime, the Civilian Complaint Review Board, an independent city agency that investigates charges of police misconduct, found that complaints involving stops and searches have more than doubled in recent years, increasing to 2,556 last year from 1,128 in 2003. Complaints involving police stops now account for 33 percent of all complaints, up from 20 percent in 2003.

The department's recent assurance that it has stopped racially profiling suspects begs the question: why are blacks disproportionately the target of stops and frisks? The department claims that the largest share of city crime is black-on-black, but there's reason to question whether stop rates correlate with crime rates.

Jeffrey Fagan, a professor of law and public health at Columbia University who studied the issue in 1999 for Eliot Spitzer, then the attorney general, said he was not surprised that the number of stop-and-frisks went up “during a period of no accountability.” But, he added, “it is an astonishing fact that stop rates went up by 500 percent when crime rates were flat.”