OMG that is what I didn't figure. Try it on your legs or wherever....that is why there is no thumb mark ...it was from behind she scratched him. Forefinger and pointing finger on both hands are almost similar lengths. Wonder if they have anyone on the defence to compare Allison's fingers to scratch marks (either from behind or from the front)?
Total, just acted it out in thin air. I'm unsure if from front or behind now. From the front the scratches would have been as appears. From behind he would have had to have been below her and scratching upwards to get that same angle the scratches left. Either way it doesn't matter, she left them there for the world to find! Good on her! IMO