A judge has acquitted a Baltimore police officer on all charges in the death of Freddie Gray, a black who died after he was injured in a police transport van.

Lt. Brian Rice was acquitted Monday after a bench trial by Baltimore Circuit Court Judge Barry Williams. Rice is the fourth of the six officers charged to go on trial in the 2015 death. Three earlier trials resulted in two acquittals and a mistrial.

Rice faced charges of involuntary manslaughter, reckless endangerment and misconduct in office. Rice is white and the highest-ranking of the officers.

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Gray died a week after suffering a spinal injury in the van last year, touching off protests and rioting.

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