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.

Kentucky State Police are searching for motive as they investigate the fatal shooting of a district judge by a sheriff after the two had an argument inside the judge’s chambers, according to police.

Kevin R. Mullins, 54, had been a District Judge in Letcher County, Kentucky for 15 years. Before that, he was a prosecutor in Letcher County, starting in 2001. The official title is assistant commonwealth’s attorney. He was a graduate of the University of Kentucky and the Louis D. Brandeis School of Law at the University of Louisville.