As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT MUFFLER FAILED CAUSING CARBON MONOXIDE TO ENTER CABIN. PILOT BECAME INCAPACITATED. AIRCRAFT FLEW FOR 1.9 HOURS UNTIL FUEL EXHAUSTION, LANDED IN HAYFIELD. PILOT RECEIVED MINOR INJURIES. AIRCRAFT WAS DESTROYED. ACCIDENT NR CHI 98LA055.