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Man Who Died on Cass Lake Worked for Grafton School District

By Bill Dubensky Aug 12, 2025 | 6:46 AM

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(KNOX) – The Grafton man who drowned on Cass Lake in Minnesota Saturday was employed by the Grafton School District.

41-year-old Jon Koehmstedt was the athletic director and assistant principal for 7-12 at Grafton High School and Junior High.

The sheriff’s office says he jumped into the water to work on a pontoon motor issue and didn’t resurface.

His body was found two hours later.

He was not wearing a life vest.

The sheriff’s office said that an autopsy was done at  the Ramsey County Medical Examiner’s Office.

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