JENKINS, Ky. — A Kentucky judge who authorities said was fatally shot by a sheriff last week was remembered Sunday as a pioneer who fought opioid addiction and favored treatment over jail for low-level drug offenders.

Hundreds of mourners, including a procession of black-robed judges, filed into the Jenkins High School auditorium to pay their respects to District Judge Kevin R. Mullins, 54.

Letcher County Sheriff Shawn M. Stines is accused of shooting Mullins several times in the judge’s…