Southwestern Illinois authorities are investigating the death of an 83-year old woman whose body was found behind a Belleville business.  The Belleville News-Democrat reports they’ve identified the woman found dead Tuesday morning but aren’t publicly releasing her name until more of her survivors are notified.  Police say an autopsy was done later Tuesday, but investigators also are withholding those findings.  Authorities say the woman was found wearing a black pajama top with a red heart pattern, white pajama pants with a pink design, white tennis shoes, a thin gold band on her left ring finger and stud earrings.