By JULIE HIRSCHFELD DAVIS, The New York Times

WASHINGTON — President Obama on Monday called for prompt action to change police practices across the country after the deaths of unarmed black men in Ferguson, Mo., and Staten Island at the hands of white officers exposed frustrations about law enforcement in minority communities.

Mr. Obama, unveiling the recommendations of a White House task force created in the wake of the killings, said local law enforcement agencies should consider requiring independent criminal investigations and independent prosecutors in cases where the use of force by police officers results in injury or death.

He also said police departments should take additional steps to build trust with communities. They include adopting policies to address racial profiling, relaxing their approach to mass demonstrations and collecting more data on shootings and deaths by the police.

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