A Michigan teenager charged in a mass shooting that left four students dead at his high school made his first appearance in trial court Wednesday. Ethan Crumbley, 15, was arraigned in Oakland County Circuit Court via video from the jail where he is being held on first-degree murder, assault with intent to murder, terrorism and gun charges. Crumbley is charged as an adult in the Nov. 30 shooting at Oxford High School, about 30 miles (50 kilometers) north of Detroit. Crumbley’s attorneys had waived his preliminary examination, moving the case toward trial. Through defense attorney Paulette Michel Loftin, Crumbley entered a plea of not guilty. Crumbley said little during the hearing, except to acknowledge that he could hear the judge and confirm that he was OK with the hearing proceeding via Zoom. Judge Kwame Rowe set a status conference for Jan. 19. Crumbley’s parents are charged with involuntary manslaughter in …