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. ###>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.