NICOLLET COUNTY (WCCO) — Authorities say a St. Peter Treatment Center patient stabbed his mother multiple times at Seven Mile Creek Park.

On Tuesday at 6:10 p.m., the Nicollet County Sheriff’s Office took a report of a man stabbing a woman at Seven Mile Park. Deputies responded to the scene and arrested Burton James Ewing, Jr., who was allegedly stabbing his mother, identified as 69-year-old Marlys Helen Olson of Coon Rapids.

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Olson was airlifted from the scene with multiple stab wounds.

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According to Patrice Vick from the Minnesota Department Of Health Services, Ewing, 48, was allowed off-campus liberties and had a pass to be with his mother at the time of the incident.

Ewing is in Nicollet County Jail pending charges of attempted homicide.

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Vick says this situation is not related to William Pfeffer’s disappearance from the treatment center.