I would really like to ask JR about her feet. In fact, if I had one question to ask him it may even be that (well, ok, are you telling the truth may be first, but I am imagining he would say yes to that no matter what).
I'm a bit off my game today (not enough sleep), but I'm assuming one of them would notice she was barefoot (assuming she was). If not, maybe they didn't realize much else that was going on. It seems like a small thing, but unless it's her normal behavior, it's not, IMO.
If she did decide to cut back through the alley and someone chased her, she wouldn't have been able to run fast w/o shoes, given the description of the alley. Or, if her feet were cut from the first trip down the alley, maybe someone picked her up and carried her, as described by Tony Gatto's witness.