This information comes from the mayor of Country Club Hills, the town where Kelly's body was found.
Kelly died shortly after pleading guilty in a federal fraud case. He had been a close friend and adviser to former governor Rod Blagojevich.
Country Club Hills Mayor Dwight Welch plans to hold a news conference Thursday to discuss Kelly's toxicology report.
The Cook County Medical Examiner's Office has not made its report public yet.
