@johnnysachs, @daraghj82 - I think we're approaching this in different ways. I'm well aware that the original investigating team don't appear to have been up to much. But this cold case unit has had some success in recent times and I'm making an educated guess that they've pieced together a much better investigation and pursued many avenues to lead them to this targeted appeal.
They've specifically asked for help in identifying MIB1 for that very reason - they think he may have been involved in Deely's appearance. It's not a case of them seeking the public's help in piecing everything together from scratch, working out who all these other people are and what their motives were.
Their work to date has taken them down this narrow path to MIB1. In that context, and given the briefing to The Sunday Times about arranging a meet with a man and a woman, I outlined my theory yesterday.