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,

It’s just so sad. I just hate it,” said Mike Watts, the Letcher County circuit court clerk. “Both of them are friends of mine. I’ve worked with both of them for years.”

Kentucky State Police say 43-year-old Sheriff Mickey Stines shot and killed 54-year-old District Judge Kevin Mullins inside the courthouse Thursday afternoon. Circuit Court Clerk Mike Watts said he’s still struggling to understand what happened, as he saw both men eat lunch together just a few hours earlier.