In this July 13 frame taken from video provided by the Waller County Sheriff's Department from a motion-operated camera, emergency personnel carry a gurney near Sandra Bland's cell, at the Waller County jail in Hempstead, Texas. AP hide caption

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Officer Ted Simola, a member of the LAPD mental evaluation unit, responds to a call in February. Maya Sugarman/KPCC hide caption

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Lavall Hall's mother, Catherine Daniels, is comforted by her cousin Alfonzo Hill as she speaks with the media in February. Hall, who was schizophrenic, was fatally shot by police officers earlier this year. Joe Raedle/Getty Images hide caption

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Police block the intersection of Dowdy Ferry Rd. and Interstate 45 during a standoff with a gunman barricaded inside a van in Hutchins, Texas. Brandon Wade/AP hide caption

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A Baltimore police officer attempts to secure a crime scene with tape at the scene of a shooting at the intersection of West North Avenue and Druid Hill Avenue in West Baltimore, Md., on May 30. Local media have reported more than 35 murders in the city since the April rioting over the death of 25-year-old resident Freddie Gray. Jim Bourg/Reuters/Landov hide caption

itoggle caption Jim Bourg/Reuters/Landov

Sgt. Aaron Goodwin, of the Portsmouth, N.H. Police Dept., seen here being questioned in May, should have refused a gift from an elderly woman he met while on the job, a review panel says. Rich Beauchesne/AP hide caption

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Taser International is now selling police departments the technology to store videos from body cameras. Patrick T. Fallon/Bloomberg via Getty Images hide caption

itoggle caption Patrick T. Fallon/Bloomberg via Getty Images

Officers stand watch at the intersection of West North Avenue and Pennsylvania Avenue as protesters walk for Freddie Gray in Baltimore in April. Gray died from spinal injuries about a week after he was arrested and transported in a police van. Jabin Botsford/The Washington Post/Getty Images hide caption

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This combination of undated photos released the Mississippi Bureau of Investigation shows, Marvin Banks, left, and his brother Curtis Banks. The brothers have been arrested in connection with the fatal shooting of two Hattiesburg, Miss., police officers on Saturday. AP hide caption

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In a FIT zone at Bell Street Park in East Palo Alto, Calif., friends from the neighborhood now gather regularly to play volleyball. Jeremy Raff/KQED hide caption

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Public memorials, like the one at the scene where Freddie Gray was arrested, have become sites to commemorate other deaths of unarmed black men in similar police encounters across the country. David Goldman/AP hide caption

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President Obama is condemning the unrest in Baltimore, saying a handful of "criminals" are taking advantage of the situation following the April 19 death of Freddie Gray. Jacquelyn Martin/AP hide caption

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