(AP) — A southeastern Michigan teenager charged in a mass shooting that left four students dead at his high school and others wounded has made his first appearance in trial court.

Fifteen-year-old Ethan Crumbley was arraigned Wednesday in Oakland County Circuit Court via video from the jail where he’s 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 that killed four of his schoolmates.

Crumbley’s attorneys on Friday waived his preliminary examination, moving the case toward trial.

Through defense attorney Paulette Michel Loftin, Crumbley stood mute Wednesday and entered a plea of not guilty.