(AP) — The case against a 16-year-old who is accused of helping with the fatal assault of a Western Nebraska jail guard earlier this year will remain in adult court.

District Judge Travis O’Gorman rejected a motion to move Guy Eagle Elk’s case to juvenile court.

Eagle Elk is accused of aiding in the assault that killed Scotts Bluff County Corrections Officer Amanda Baker on Feb. 14. He has pleaded not guilty.

Prosecutors say Eagle Elk told a fellow inmate how to choke Baker into unconsciousness so her jail keys could be taken, and Eagle Elk encouraged the other inmate to carry out the attack.

Eagle Elk, of Lisco, Neb., has said he didn’t intend for the guard to be seriously hurt. He is scheduled for a July trial.