On Wednesday, local time, a judge accepted the findings of an evaluation report for Siders, who appeared in court in a wheelchair. Vinton County prosecutor William Archer did not object to the findings. Siders's attorney, Dorian Baum, said after the hearing that his client's mental health had been declining for years and was "not restorable."
"It's not really a surprise to any of us that he's not been found competent at this point," Baum said. "He doesn't fully understand or appreciate what's going on."
The charges stem from June 30, when authorities rescued the children from a home in Hamden, a rural town about 129 kilometres south of Columbus. Investigators said the children, ranging in age from 18 months to 18 years, had been mostly confined to a 3.5-square-metre room under appalling conditions for much of the past four years. They were found with human waste all around.
"Most of our livestock was kept in better conditions than the children," Vinton County Sheriff Ryan Cain said at the time, calling it a "disgusting scene."
The children were not enrolled in school, and the family avoided leaving a paper trail, including birth certificates. Some children were described as "feral" and unable to speak. Ohio Attorney-General Andy Wilson noted that the 18-year-old could not spell their name.
Also charged were the children's parents, Elizabeth and Gary Siders Jr., and their grandmother, Christina Siders. All have pleaded not guilty. Neighbours in the town of fewer than 1,000 people said they did not know children were living at the house.
The children have since been placed in care.