Police in Parry Sound, Ont., found the body of a missing 43-year-old man in Seguin River on Thursday.
Officers say witnesses saw a person go into the river before they lost sight of them and called emergency services.
The person was identified as Jeremy Atkins, 43, from Parry Sound.
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The investigation is ongoing under the direction of the Office of the Chief Coroner and the Ontario Forensic Pathology Service.