“We do not deny Yakima School District all action to ensure the safety of its students,” Judge George Fearing wrote for the Washington State Court of Appeals panel. “The school district may petition for an extended expulsion based on safety concerns. Nevertheless, the school district did not follow these procedures. Instead, it extended M.G.’s long-term suspension for an indefinite period of time in violation of RCW 28A.600.015(1).”