Troopers say the death capped a day long argument between 60-year-old John Tow and his 32-year-old son Jonathan Tow.
When the ambulance got to the home in Shoals, Jonathan Tow was lying outside the doorway with a knife wound to his neck.
John Tow is in the Martin County Jail. He faces a charge of criminal recklessness with a deadly weapon.
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