From the facts as presented, it sounds like he'll win the wrongful death suit. I'm not sure how there would be a cause of action for intentional infliction of emotional distress, since the man's dead, but his wife will get at least 30 years worth of whatever a carpenter in that area makes, maybe times three.
What I don't get is the alleged theft they stopped him for. I've never seen a Wal-Mart gift card, but if they're like any modern gift card I've ever seen the value has to be added at the register at the time of purchase. You can steal all you want but they're not worth anything - especially not a random number like $94 - until you pay the cashier and she swipes the card to add the value.
I caught that too, I'm thinking maybe he had the cashier swipe it, and then took off running with it, before paying.