The Oneida County Medical Examiner’s Office is investigating the death of an inmate in the county jail. Thirty-nine-year-old Jillian Buza of Eagle River was being held for a June incident at the Marshfield Clinic. Buza and her husband, Joseph, were accused of threatening to attack a physician’s assistant with a hatchet and a meat tenderizer. Jailers say it appears she died of natural causes. Joseph Buza has entered a not guilty plea.