A Kentucky judge was fatally shot in his courthouse chambers on Thursday, according to authorities, who said a county sheriff has been arrested and charged with murder.

District Judge Kevin Mullins was shot inside the Letcher County Courthouse. Kentucky State Auditor of Public Accounts Allison Ball confirmed Mullins was the shooting victim in a post on social media.

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.