Transcript for 'This Week': 'Stop-and-Frisk' Backlash
And we are back now with the debate on big city crime. A federal judge ruled this week that the stop and frisk tactics of new york city police are unconstitutional, drawing a stiff rebuke from the mayor, and drawing support from the democrats out to replace him. Our roundtable it is going to weigh in. First pierre thomas sat down with the new york police chief. Reporter: For critics, it's images like this that fuel the resentment of the nypd's policy of stop and frisk. For some blacks and latinos, it's naked racial profiling, with them as the targets of an occupying force. I remember them banging my head into this. Reporter: Is it fair that african-americans and hispanics make up 52% of the city's population, but black and latino males represent 84% of those stopped. Nypd keep your hands off me. Reporter: But to the police and mayor, stop and frisk, enforced by a racially-diverse department, is a highly effective crime-fighting tool. We have to give the members of the police department the tools they need to do their jobs without being micromanaged and second-guessed. Reporter: We met with ray kelly, and he flatly rejected a federal judge's conclusion that it violates the constitution. They called it unconstitutional, why is it not racial profiling? You have to apply a formula of sorts. Do the stops comport with the description given by the victims of perpetrators of violent crime? And our stops do. 97% of the shooting victims in new york city are black or latino. As is the identified perpetrators of these crimes. Reporter: The issue for some of the people, the thousands who are stopped, is that if they've committed no crime, you find no weapon, that it's creating a sense of resentment. As an african-american male, I've been pulled over a couple times for reasons I couldn't understand. And afterwards I felt violated and frustrated. coming from? Why they're frustrated? Absolutely. Understand, nobody wants to be stopped. We have engaged in training for several years focusing on the issues, to do the stops with courtesy and respect. Reporter: Stop and frisk allows officers to detain people they deem suspicion in high-crime areas. A federal judge said the practice targets minorities calling it demeaning and humiliating. Her ruling calls for a monitor to oversee nypd practices, and for some officers to wear cameras to record arrests as they do in an increasing number of cities. Kelly is skeptical. When do you turn it on or off? Dew it on when somebody comes and wants to give you confidential information? Reporter: He points to the facts, there is far less crime and blood in the streets. There have been more than 7,300 deaths in the 11 years since bloomberg took office than in the previous decade. That's a 50% drop. What we're g, trying to do, is save lives. Record low shootings, things are going right in new york. And this decision certainly has the potential of overturning it.
This transcript has been automatically generated and may not be 100% accurate.