He co-authored the books ‘Maddie 129’ book‘ and ‘Maddie: neither truth nor consequence’ with journalist Luís Maia. Like many others that the McCanns wish to silence, Carvalho doubts the abduction thesis as posited by the McCanns et al. A selection of articles where Carvalho gives his opinion on the McCann case can be viewed at McCann Files and Joana Morias.