Christopher J. Sullivan was taken by air ambulance to Heartland Regional Medical Center in St. Joseph, according to the report.
The crash occured about 5:55 p.m. as Sullivan was driving the ATV on a nature trail one mile north of Conception Junction, according to the Troop H report.
He swerved to miss a deer in the roadway and went off the north side of the trail. The ATV struck an embankment and overturned, coming to rest on Sullivan, troopers said.
Contact Eric Crump at marshalleditor@socket.net
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