"He's not the kind of person that would strike you. He is a mouse of a man. He's also a man who is totally honest and totally innocent; innocent in the sense of being a simpleton. He went into this as a glorious adventure. He was taken out of oblivion. He was given this task to perform. He traveled abroad, probably for the first time in his life, to Poland. He came back with these earth-shattering results. The big point: there is no significant residue of cyanide in the brickwork. That's what converted me."