An autopsy is scheduled Tuesday on a Chillicothe man killed on his property Sunday. 76-year old Arco Rosenow was spreading gravel on a private road leading to his house on Hallock Hollow Road when his road grader overturned. The Peoria County Coroner's office says when Rosenow left his pickup truck to tend to the grader the pickup shifted pinning him between his truck and an embankment. The coroner's office says a preliminary cause of death is axphyxiation.