Dubois previously went missing while snowmobiling in the area on Dec. 18, 2017. Authorities have been searching for him since then, but have called off search attempts on multiple occasions. A search was suspended there on Jan. 9 due to low visibility in the water.
Related Content: DEEP identifies snowmobile driver missing in Griswold
The Chief State Medical Examiner’s Office says an autopsy has determined Dubois died from blunt injury to the head and submersion underwater. The death has been ruled accidental.