Ferguson, a year later

A St. Louis County police officers respond after shots were fired during a protest march on August 9, 2015 on West Florissant Avenue in Ferguson, Missouri.

A St. Louis County police officers respond in an MRAD vehicle after shots were fired during a protest march on August 9, 2015 on West Florissant Avenue in Ferguson, Missouri.

Protesters march in the rain, Sunday, Aug. 9, 2015, in Ferguson, Mo. Sunday marks one year since Michael Brown was shot and killed by Ferguson Police Officer Darren Wilson.

Protesters yell at police in the rain, Sunday, Aug. 9, 2015, in Ferguson, Mo. Sunday marks one year since Michael Brown was shot and killed by Ferguson police officer Darren Wilson.

Protesters march in the rain, Sunday, Aug. 9, 2015, in Ferguson, Mo. Sunday marks one year since Michael Brown was shot and killed by Ferguson police officer Darren Wilson. (AP Photo/Jeff Roberson)  (Jeff Roberson / AP)

Demonstrators participate in a protest march on August 9, 2015 on West Florissant Avenue in Ferguson, Missouri, marking the one year anniversary of an unarmed black teen, Michael Brown, who was shot and killed by a white police officer, throwing America’s troubled race relations into harsh relief.

Gina Gowey, of Ferguson, Mo., protests on West Florissant Ave., Sunday, Aug. 9, 2015, in Ferguson, on the one-year anniversary of Michael Brown being shot and killed by Ferguson Police Officer Darren Wilson.

A crowd prays at the spot in Canfield Green Apartments on Sunday, Aug. 9, 2015, where Michael Brown was fatally shot by Ferguson police officer Darren Wilson one year ago today.

People attend a memorial service to mark the anniversary of Michael Brown’s death on August 9, 2015 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on August 9, 2014.

People attend a memorial service to mark the anniversary of Michael Brown’s death on August 9, 2015 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on August 9, 2014.

People march from the Canfield Green Apartments where Michael Brown was killed past a vacant lot where a gas station once stood following a memorial service marking the anniversary of Brown’s death on August 9, 2015 in Ferguson, Missouri.

A vehicle leaves the Canfield Green Apartments where Michael Brown was killed following a memorial service marking the anniversary of his death on August 9, 2015 in Ferguson, Missouri. Brown was shot and killed by a Ferguson police officer on August 9, 2014.

People hold posters during a Michael Brown memorial rally on Union Square August 9, 2015 in New York.

Michael Brown Sr. comforts his wife Cal Brown during a moment of silence in the center of Canfield Street, where Michael Brown Jr. was killed, during a memorial service marking the anniversary of his death on August 9, 2015 in Ferguson, Missouri.