As residents of a small town in southeast Kentucky mourn the loss of a prominent district judge, they’re looking for answers about the argument that authorities say led up to his killing inside the judge’s chambers and the sheriff’s arrest in his death.

(CNN) — A Kentucky sheriff has been arrested Thursday in connection with the fatal shooting of a district judge inside a courthouse, Kentucky State Police said. District Judge Kevin Mullins, 54, was found with multiple gunshots and he was pronounced dead at the scene, state police said.

They'd been friends for years and were two well-known elected officials. So why would Letcher County's sheriff shoot its only judge in the courthouse?