NASHVILLE, Tenn. (AP) — A medical examiner has concluded that a Nashville restaurant owner died of accidental suffocation by carbon dioxide inhalation when he was trapped in a cooler. After an autopsy, the medical examiner said Tuesday that 47-year-old Jay Luther would have been overcome within just a few minutes of entering the Germantown Cafe East cooler Sunday night. The cooler contained dry ice due to a power outage over the weekend.