 He stated that he was alone at home on the morning of the kidnapping, and the police were satisfied with his explanation that he was using the minibus to transport rubble from the construction of his home.Speculations arose of child pornography rings or organ theft, leading officials to also investigate possible links to the crimes of French serial killer Michel Fourniret.Kampusch had carried her passport with her when she left, as she had been on a family trip to Hungary a few days before, so the police extended the search abroad.