Suffice it to say if you were in Walmart THERE WERE CAMERAS. Walmart is full of them down to each checkout lane even. Whether anybody's interest was attracted enough to actually look at them is another story. If they do, there's almost certainly evidence of your crime. If someone recalls you as a regular they almost certainly CAN trace you back to your bank account. Once they have a name and social, it's not going to be hard to find you even if you don't have your current address on file.
As TM says, I'd avoid that Walmart for a while. If they think you're a habitual shoplifter, they may be watching for you (we used to have a little rogues gallery in the employee break room).
If contacted by the store or the police, do not talk to them. If the police insist, refer them to your lawyer (which I might be researching who that might be if you're going to take on the life of crime).

