In 2013, NYC police stopped using the “stop, question, and frisk” method and mandated instead that officers provide thorough justifications for stopping suspects. This led to far fewer detainments of innocent people and increased the ratio of stops producing evidence of the suspected crime.

See the source article by following the link below:
In 2013, NYC police stopped using the “stop, question, and frisk” method and mandated instead that officers provide thorough justifications for stopping suspects. This led to far fewer detainments of innocent people and increased the ratio of stops producing evidence of the suspected crime.