It is worth remembering that the Portuguese Police have actually concluded their case once already, and the official finding was that the McCanns were responsible for concealing Madeleine's death, if not direct responsible for killing her.
Goncalo Amaral is using this official report in his defence against the McCann's libel claim. His own theory was not a million miles from my own, in that she was accidentally killed and that the parents then covered it up. Should he be successful in his defence he will be free to publish his book, 'The truth of the lie' in Britain, should he find a publisher to carry it.
A translated audio copy can be found online, but I'll refrain from posting a link as I'm poor enough as it is. Google is your friend. His name and the title is all you need.
What i will say is that the 'man seen near the beach carrying a child' is definitely not a new lead, as Crimewatch makes out. I knew about that over a year ago, and it was strongly suggested then that Hein may have a good point about the photofit.