Civil rights attorney Ben Crump called for the Leland Police Department to release video from a cop running over and killing Kadarius Smith with a cruiser.
Kadarius Smith, 17, had tire tracks on his back, his mother said.
The body of Dexter Wade, a Black man killed by Mississippi police and buried without his family being notified, was secretly dug up by county officials more than eight months after he was first reported missing.
The 15-year-old was unarmed as a Mississippi cop shot him in the head, witnesses say.
Eugene Lewis was handcuffed when a Mississippi Highway Patrol officer roughed him up.
