Attorney: Dakota Access protester jailed after refusing to comply with grand jury investigation An attorney for Steve Martinez, a Bismarck resident, said he was arrested after being held in contempt of court for refusing to comply with a grand jury subpoena for a federal investigation into the 2016 injury of another protester. Written By: Adam Willis | × Law enforcement officers face off against Dakota Access Pipeline protesters on Nov. 20, 2016, at the Backwater Bridge along Highway 1806. Submitted photo from Morton County BISMARCK — A Dakota Access Pipeline protester was arrested and admitted to a Burleigh County jail last week for refusing to cooperate with a federal grand jury investigation into the 2016 injury of another protester, according to his attorney.