and use of force has also fallen by 60%. >> when they get dispatched to a call or they're going to make a self-initiated contact, they turn the device on. >> how you doing, sir? what happened to your wheel? can i call you a tow truck or something? >> i'm able to exit the vehicle, make contact with this person. i can hold this back and i can search through it. there is no manipulating what really occurred or what was really said. one day this piece of evidence will serve as most of my reporting in court. >> reporter: but will police cameras limit racial profiling and should they be implemented in a city as big as new york? people we spoke to were divided. >> i think that it would help to change the relationship between the police and the people of new york city. >> tax dollars can go to so many other things, fixing so many