He said positive identification was confirmed using tattoo comparison and hospital I.D. bands.
"An autopsy showed signs of cold exposure, but the final cause and manner of death will be determined at a later date pending police, toxicological and autopsy reports," O'Neil said.
Geneva police asked for the public's help finding Talley on Nov. 26. According to media reports, he left Bolingbrook Adventist Hospital on foot against the advice of doctors. He was last seen around 6 p.m. on Nov. 10 at Remington Boulevard and Veterans Parkway in Bolingbrook.