Obviously down to only two possibilities now. Polonium smuggling operation or Assassination. Either way the stuff came from Moscow.
The German inquiry focuses on whether he was in illegal contact with radioactive materials rather than the murder of Mr Litvinenko itself. At a press conference, a senior prosecutor said that one possible explanation was that while "packaging or transporting" the polonium before the meeting, Mr Kovtun had been "sloppy" and accidentally touched it."