In his writings he had made much of homicidal "gas vans," but he was not able to refer to any authentic photograph, any plan, any technical study, or any expert study.
Nei suoi scritti, egli dava molta importanza ai camion omicidi a gas; tuttavia non era in grado di fare riferimento a nessuna vera fotografia, a nessun piano, a nessuno studio tecnico, a nessuna perizia.