(BOONVILLE) - The Warrick County Chief Deputy coroner says the death of a missing Alzheimer's patient near Boonville has been ruled accidental due to freshwater drowning.
66-year-old Mary Elaine Heidorn apparently fell in a ditch near her home, became stuck in the mud and then fell face-down in about five inches of water.
Heidorn had been missing since walking away from her home.
She was the subject of Indiana's first silver alert issued Tuesday morning.
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