Undated file photo provided by the Illinois Lottery shows Urooj Khan, 46, of Chicago, posing with a winning lottery ticket.. (AP Photo/Illinois Lottery, File)

Cook County Medical Examiner Dr. Stephen Cina speaks at a news conference in Chicago, Friday, Jan. 18, 2013, regarding the exhumation earlier in the day of Urooj Khan, 46, who died in July of cyanide poisoning after winning the lottery. Cina said the remains of Khan were in an advanced state of decomposition but pathologists were able to obtain samples from most major organs as well as the man's hair and fingernails. Final results from autopsy won't be complete for a few weeks. His death was initially ruled a result of natural causes but later reclassified a homicide. (AP Photo/Nam Y. Huh)

Workers at Rosehill Cemetery in Chicago on Friday, Jan. 18, 2013, place the body of Urooj Khan into a hearse after it was exhumed for an autopsy to help solve the mystery surrounding his death. Khan, 46, who was poisoned with cyanide after winning the lottery, died in July as he was about to collect $425,000 in winnings. His death was initially ruled a result of natural causes, but a relative pressed for a deeper look and his death was reclassified as a homicide. (AP Photo/M. Spencer Green)

Cook County Medical Examiner Dr. Stephen Cina speaks at a news conference in Chicago, Friday, Jan . 18, 2013, regarding the exhumation earlier in the day of Urooj Khan, 46, who died in July of cyanide poisoning after winning the lottery. Cina said the remains of Khan were in an advanced state of decomposition but pathologists were able to obtain samples from most major organs as well as the man's hair and fingernails. Final results from autopsy won't be complete for a few weeks. His death was initially ruled a result of natural causes but later reclassified a homicide. (AP Photo/Nam Y. Huh)

Workers at Rosehill Cemetery in Chicago on Friday, Jan. 18, 2013, begin the process of exhuming the body of Urooj Khan who was poisoned with cyanide after winning the lottery. Khan died in July as he was about to collect $425,000 in lottery winnings. His death was initially ruled a result of natural causes, but a relative pressed for a deeper look and his death was reclassified as a homicide. (AP Photo/M. Spencer Green)

A backhoe is seen at Rosehill Cemetery in Chicago, Friday, Jan. 18, 2013, as workers begin the process of exhuming the body of Urooj Khan who was poisoned with cyanide after winning the lottery. Khan died in July as he was about to collect $425,000 in lottery winnings. His death was initially ruled a result of natural causes, but a relative pressed for a deeper look and his death was reclassified as a homicide. (AP Photo/M. Spencer Green)