I had a pygmy rattler in the trunk of a car I rented. Fortunately I didnt get struck when it lunged at me...and managed to beat it silly with a broom before I could remove it
Its not unusual for snakes to show up in unusual places in Florida.
And, yes, Wal-Mart does hold some liability in this...as a business they have to make sure their place is safe for its customers...and especially if they have had “snake issues” in the past
If this is the same guy as a while back the snake had been dead a while before it bit him.