I think the Kercher family have to try to believe in the Italian justice system because they will still be hoping that if Amanda Knox and Raffalele Sollecito are truly innocent then the person(s) who acted with Rudy Guede (and it does seem pretty certain that he didn't act alone) are eventually caught and brought to justice. There will be no closure for them otherwise. Amanda Knox would have served three years in prison, in any event, for the slander of Patrick Lumumba and the terrible suffering it has caused him and his family.