Just looked at the CCTV yet again. At about 2:07-2:08, the Blue Hoodie has walked to the left, but turns around to face back towards where Jill is standing, and if you look - just in that couple of frames - through the shop window just ABOVE that placard or screen or whatever it is, and just below where the curly metal scroll sticks out from the end of the clothes rack on the left - his face is almost clearly visible as he looks back towards Jill. Right at the far left end of the shop window.
Does anyone else see that?
I was using the YouTube version of the CCTV clip, full screen, and it was at the 2:07-8 mark, from here:
Jill Meagher CCTV (VERY CLEAR VERSION) - YouTube