As 15-year-old Dani Countryman struggled beneath Gilberto Arellano Gamboa, pinned to the floor with her pants down, he called on his cousin to help subdue the girl. Alejandro Rivera Gamboa responded by stepping on Countryman's throat until she stopped moving. That's how investigators described Countryman's death in a court document released Tuesday. Evidence outlined in the document included statements by the defendants and a bloody shoe that matched an imprint on Countryman's chest. Gilberto Javier "Gabe" Arellano Gamboa, 23, who is also known as Rivera Gamboa, and Alejandro Emeterio "Alex" Rivera Gamboa, 24, were arraigned Tuesday in Clackamas County Circuit...