Plutonium
Sorry to rain on your parade, folks, but the article says:

"Detectives say Madeleine's parents, the friends the McCanns were with in Portugal and people known to the family before they went away are not suspects or people they need to investigate."

also

"Over the last two years what the review has told me is that there is no clear, definitive proof that Madeleine McCann is dead," Det Ch Insp Redwood said.

"So on that basis, I still genuinely believe that there is a possibility that she is alive."
You bastard!

How dare you let facts and reason get in the way of a good rant and a conspiracy theory?

Sphinx is now so annoyed she's had to take off her tin-foil hat to cool the vein throbbing in her forehead.