As wrong as I think it is, the store has already been written off as a total loss minus the physical building and maybe the shelves. When things get settled and Walmart comes back in, all that stuff in the store will probably be hauled straight to a landfill because it is easier than picking through to see what is worth salvaging.
It may not be ethical to loot the place, but I rather have the stuff than let it be hauled off as trash by a multi-billion dollar company. The wrong was already committed when the looting first happened. Now, it is just scavaging for what is left over. However, if you are in uniform, it's a direct slap in the face to the whole department to be doing any of that.