WNBA superstar Skylar Diggins-Smith wants justice in her home state ... for the black man who's near-lynching was captured on video, so she's fired off a letter to U.S. Attorney General William Barr.
TMZ has obtained a copy of the letter Skylar and fellow Roc Nation client Yo Gotti sent to the Department of Justice regarding the case of Vauhxx Booker ... who was horrifyingly attacked over Fourth of July weekend.
Video of the incident showed several white men pinning Vauhxx up against a tree and calling for someone to bring a noose for him.