What happened
The pilot was attempting to return to the flight's origin airport due to encountering bad weather. Upon approaching the vicinity of Lewis/Lockport Airport in Romeoville, Illinois, the pilot found that low ceilings prevented a landing at that location.
As the pilot continued, he noted that fuel levels were becoming low. Unsure of his exact position, the pilot attempted to locate Dupage County Airport in West Chicago, Illinois. However, upon reaching the area of the Dupage airport, the pilot encountered similarly low ceilings. Just as the pilot was preparing to declare an emergency, the aircraft ran out of fuel. The pilot identified a large field and executed a forced landing.
The investigation
An examination of the aircraft's four fuel tanks revealed that there was no fuel present in any of them. A mechanical inspection of the airplane showed no anomalies.