Judge disqualifies SLO County District Attorney from prosecuting Tianna Arata case Posted at 11:03 AM, Dec 11, 2020 and last updated 2020-12-11 18:25:52-05 A San Luis Obispo County Superior Court judge on Friday approved a defense motion to disqualify the San Luis Obispo County District Attorney's Office from further prosecuting the case against community activist Tianna Arata. Arata, who is charged with 13 misdemeanors in connection with a July 21 Black Lives Matter protest in San Luis Obispo, appeared in court via livestream Friday morning. In court Thursday, her attorneys argued that District Attorney Dan Dow had made several statements on social media and at public events that show implicit bias against the Black Lives Matter movement.