(CBS) – An 8-year-old refugee from Africa who died at O’Hare was killed by e. Coli bacteria, the Cook County Medical Examiner’s Office said Thursday.

David Dieme died Oct. 4 after landing at the Chicago airport.

Results of the autopsy were released this week.

Dieme, originally from Congo, was traveling with his father and several other children, who arrived to Chicago on a flight from Dubai.

After clearing paperwork, the family was being escorted to their next flight, when a U.S. Customs and Border Protection officer noticed Dieme unresponsive

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