Now, a full autopsy will be done to see if more can be learned about his death and whether he may have been murdered. Authorities have previously said they've determined there was a lethal amount of cyanide in Khan's blood system.
According to the Tribune:
"In court papers last week, Chief Medical Examiner Stephen J. Cina said it was important to exhume the remains 'as expeditiously as possible' since Khan's body was not embalmed. ... Cina said it was necessary to perform a full autopsy to 'further confirm the results of the blood analysis as well as to rule out any other natural causes that might have contributed to or caused Mr. Khan's death.'
"A pathologist will take samples of Khan's stomach contents to try to determine how the cyanide was ingested, Mary Paleologos, Cina's spokeswoman, has said. They will also look at other organs such as the lungs to make certain the cyanide wasn't inhaled, she said."
The medical examiner's office initially ruled that the 46-year-old Khan had died of natural causes. No autopsy was performed. At that time, the medical examiner's office did not routinely do autopsies on those older than 45 unless the death was suspicious. The age cutoff has since been raised to 50.
A few days after that initial ruling, though, a family member contacted the medical examiner's office and expressed concern about Khan's death. That led to tests on some of Khan's blood that had been stored. A lethal amount of cyanide was discovered.
And now, Chicago police are investigating.
Khan's relatives, by the way, have been arguing over who gets the money.