Ver Cuevana 3. In the 50-minute documentary, John van den Heuvel provides insight into the six liquidations that Holleeder is suspected of. At the crime scene, he reconstructs the underworld murders on the basis of police files and his own investigation. In the interviews, April van der Bijl and Sonja Holleeder explain why they are convinced that Holleeder is responsible for the murders of Thomas van der Bijl and Cor van Hout.