BBM.
Personally I don't buy that at all. (Not having a go at you Skigirl, it is the general consensus)
A man who was paying attention to the surroundings enough to notice a girl BEHIND him was distressed remembered white shorts as black pants and dreadlocks as a shaved head?
He FOLLOWED Hannah. It wasn't a cursory glance in her direction. He was actually watching her and the man who appeared and put his arm around her. There's no way anyone could be that far off to say the opposite of what they saw.
I totally agree. I think either the police lied about some details in the description as a strategic move not trying to scare JM or maybe the WG memory wasn't so great because I don't think he talked to police until a few days later.