A Cheyenne man accused of shooting a 19-year-old man in the head and dumping his body in a reservoir has pleaded not guilty to second-degree murder and property destruction.

Armando Ramirez-Serna entered the plea during his arraignment this (Friday) morning in Laramie County District Court.

The 22-year-old Ramirez-Serna is alleged to have shot Justin Robinson while trying to rob him of a pound of marijuana.

Robinson was found floating face down in a reservoir on the Wyoming Hereford Ranch Nov. 26. His burnt SUV was found nearby.

Ramirez-Serna's trial has been set for May 14. If convicted of second-degree murder, he could face 20 years to life in prison.

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