Three Colorado police officers have resigned after video surfaced of their arrest of a 73-year-old white woman last June, who was slammed to the ground and handcuffed. Karen Garner, who suffers from dementia, ended up with a dislocated shoulder, a fractured arm and a sprained wrist. Another widely circulated video shows officers laughing while watching footage of Garner’s violent arrest. Garner has filed a federal lawsuit, citing violations of the Americans with Disabilities Act.