GERING, Neb. (AP) — A jury has convicted a 17-year-old boy of helping plot a fatal attack on a Scotts Bluff County jail guard.

The jury took about five hours on Thursday to find Guy Eagle Elk guilty of aiding and abetting assault. He’s scheduled to be sentenced on May 29.

Eagle Elk, of Lisco, was accused of showing 16-year-old Dylan Cardeilhac, of Torrington, Wyoming, how to strangle guard Amanda Baker. She was attacked on Feb. 14, 2014.

Cardeilhac has been convicted in Baker’s death and has been sentenced to 60 years to life in prison.