A former Kentucky sheriff accused of killing a county judge in his chambers two months ago is due in court for an arraignment Monday, the first time the suspect will be back at the Letcher County courthouse since the shooting there.

Sources tell NewsNation that Stines and his wife "had some sort of a dispute" the night before he fatally shot Mullins.

A former Kentucky sheriff charged in a judge's shooting death pleaded not guilty Monday in the same courthouse where they worked together and where the attack occurred, and one of his attorneys later predicted they will present a compelling case in his defense.