She was arrested for “assault of a public servant” after police said she became argumentative. Video shot by a bystander shows her being restrained by two officers. She yells: “You just slammed my head into the ground. Do you not even care about that? I can’t even hear.” One of the officers tells the man making the video to stop filming. Elton Mathis, the Waller County district attorney, told a news conference on Thursday the autopsy report found that Bland died from asphyxiation, that she hanged herself.