WALKER, Minn. — The 41-year-old Grafton, North Dakota, man who died Sunday, Aug. 10, while boating on Cass Lake has been identified as Jon Patrick Koehmstedt.

Cass County Sheriff Bryan Welk reported at 5:50 p.m. Sunday that the Cass County Sheriff’s Office received 911 reports of a person in the water and not resurfacing on Cass Lake. Numerous law enforcement and rescue agencies responded to the lake and began to immediately search the area.

The investigation learned that Koehmstedt exited a pontoon into Cass Lake to work on a boat motor problem and didn’t resurface. Juveniles on the boat attempted to throw Koehmstedt a life jacket, and the boat began to drift in high winds. The boat was later intercepted by other boaters on the lake and the incident was reported to 911.

Around 7:51 p.m

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