The Walmart truck driver who seriously injured Tracy Morgan and killed comedian Jimmy Mack McNair when he rear-ended their limo bus last June had been awake for 28 hours and driving for nearly 14, an National Transportation Safety Board investigation concluded.

Tracy Morgan sued Walmart in July after one of the company's trucks crashed into the actor's limo bus, critically injuring Morgan and killing Morgan's friend and mentor, comedian James "Jimmy Mack" McNair. Today the company responded, to paraphrase, "Dear Tracy, We don't owe you shit. Love, Wal-Mart Stores, Inc. (Save money, live better.™) P.S.: You should've been wearing a seatbelt. "