U.S. Attorney General Eric Holder attends a meeting with the My Brother's Keeper Task Force in May. He announced today that he is stepping down from his job. Olivier Douliery/Pool/Getty Images hide caption

itoggle caption Olivier Douliery/Pool/Getty Images

Eric Garner, an unarmed black man, died on July 17 after being placed in a chokehold by police. His death sparked numerous protests, including a march scheduled for this Saturday. Here, Garner's sister Ellisha Flagg (center) leads demonstrators on a march toward the 120th Precinct on July 22, following a vigil demanding justice for her brother. John Minchillo/AP hide caption

itoggle caption John Minchillo/AP

The death of Eric Garner in police custody has sparked controversy in New York City — and it's now been ruled a homicide. On Thursday, New York Mayor Bill de Blasio (center) sat with Police Commissioner Bill Bratton (left) and the Rev. Al Sharpton during a discussion on police-community relations. Spencer Platt/Getty Images hide caption

itoggle caption Spencer Platt/Getty Images

A memorial for Eric Garner rests on the pavement near the site of his death. The poster on the ground quotes Garner; video of the arrest shows him telling police officers he couldn't breathe, shortly before he lost consciousness. John Minchillo/AP hide caption

itoggle caption John Minchillo/AP