Investigators are trying to determine why a Kentucky sheriff allegedly shot and killed a district judge after they argued inside the judge’s chambers, according to Kentucky State Police. District Judge Kevin Mullins,

A sheriff is charged with first degree murder after a district judge was shot and killed inside the Letcher County Courthouse in Whitesburg, Kentucky, police said.

Blue lights flashed in the background Thursday night as a Kentucky state trooper gave reporters details that state police had pieced together about a judge’s courthouse shooting death — allegedly by the county’s sheriff.