A judge was fatally shot in his chambers by a local sheriff after an argument at a courthouse in Whitesburg, Ky., on Thursday, state police say. District Judge Kevin Mullins, 54, was pronounced dead at the scene.

Authorities say Letcher County Sheriff Shawn M. Stines, 43, shot District Judge Kevin Mullins, 54, on Thursday afternoon after an argument inside the Letcher County Courthouse in Whitesburg, Kentucky. Here's what to know about the shooting.

Letcher County Sheriff Shawn M. Stines, 43, was taken into custody at the scene without incident, police said. He was charged with one count of first-degree murder.