The McCracken County Circuit Clerk's office says 31-year-old Ben Green entered the plea at an arraignment Tuesday. He was indicted May 5 on 16 counts of first-degree official misconduct, after multiple inmates say they were mistreated.
A special prosecutor has been appointed to take over the case and Judge Chris Hollowell recused himself.
The case stems from Green's February decision to move several inmates from protective custody to general population cells, resulting in altercations between inmates. At least three inmates claim they were physically assaulted.
Green's attorney, Jeremy Ian Smith, says there was no real procedure in place at the jail, and since Green was a supervisor, he could reclassify inmates.
Green's next appearance is scheduled for June 1 at 9 am.