Update: Guilty verdict in murder of PA Game Warden in Adams County

(Gettysburg) -- Jurors have convicted a man of first-degree murder in the slaying of a state game warden in Adams County

The jury deliberated for less than hour this morning before delivering the verdict against Christopher Johnson. Prosecutors intend to seek the death penalty.

Defense attorneys had acknowledged Johnson fatally shot Wildlife Conservation Officer David Grove. But they had argued for third-degree murder, saying Johnson was too drunk to form the intent to kill.

Investigators say Johnson had poached a deer before Grove pulled him over in Freedom Township, near Gettysburg in November 2010. A passenger testified that Johnson vowed he wouldn't go back to prison before the shootout that left Grove dead and Johnson wounded.

The out-of-town jury that's hearing the case is from Lancaster County.

The sentencing phase begins this afternoon.