A judge who was gunned down in his courthouse chambers was remembered for his public service as mourners looked for answers to unravel a mystery still shaking their tiny Appalachian town — why their popular sheriff is behind bars and charged with murder.

A district court judge in Kentucky was fatally shot in his chambers Thursday afternoon, Gov. Andy Beshear said.

The preliminary investigation indicates Letcher County Sheriff Shawn M. Stines shot District Judge Kevin Mullins multiple times following an argument inside the courthouse, according to Kentucky State Police. Mullins, who held the judgeship for 15 years, died at the scene, and Stines surrendered without incident