In televised interviews in the first few days, Kate McCann could be seen crying and Gerry's voice faltered at times.
I think that since then they have been concentrating on raising Madeleine's profile, caring for the twins and latterly defending themselves against all the accusations.
In difficult circumstances, people often try their best to appear calm and in control, fearing the embarrassment that results from breaking down in public. The McCanns apparent lack of emotion is merely a manifestation of the British stiff upper lip.
There have been other cases where victims have been blamed, or at least accused of "knowing more than they are telling." Natascha Kampusch, the Austrian girl who escaped her abductor after eight years, appeared relaxed and in control on a TV interview only a few days after her ordeal ended. People quickly began to speculate that she was in some way involved in her own disappearance, but her self-control was merely a learned defence mechanism which had kept her abductor from killing her.
In Australia, after her baby Azaria was snatched by a wild dingo, it wasn't long before fingers were pointing at Lindy Chamberlain, partly because she was never to be seen expressing strong emotions in public, even during her trial. After the agony of losing her daughter, she spent five years in prison for a crime that not only did she not commit, but never even happened.