He died from cyanide poisoning two years later and it was ruled at his inquest that he had committed suicide.

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The father of one of the children, who died by cyanide poisoning, was later convicted of the murder of his son.

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The death of a Chicago lottery winner has led to a murder investigation after a post-mortem examination found he died of cyanide poisoning.

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"Because it is so rare and is used so infrequently, the medical profession may have a difficult time recognizing cyanide poisoning, " Geller said.

CNN: Lottery winner exhumed; cyanide deaths rare, experts say

He co-authored a study about cyanide poisoning and pediatric patients.

CNN: Lottery winner exhumed; cyanide deaths rare, experts say

The Georgia Poison Center has handled more than 800, 000 cases of poisoning, he said, and cyanide rarely turned up in those cases.

CNN: Lottery winner exhumed; cyanide deaths rare, experts say