At the same time, he worked on a freelance base, among other things for the local stations RTV Oost, Omroep Gelderland, and Radio 1.
Etienne Urka, who was befriended with South Moluccans then, confessed to Lassche that he informed the BVD about the RMS plot while in prison.
It was discovered that civil servants of the Immigration and Naturalisation Services had informed the Congolese embassy and authorities that several of the people sent back to the Democratic Republic of Congo had claimed asylum in the Netherlands.
Rita Verdonk, then Minister of Immigration, at first denied any wrongdoing on behalf of herself or her civil servants, but later admitted that in several cases the Congolese embassy had been informed that returnees were former applicants for asylum in the Netherlands.
Lassche's historical documentary t Was maar een mof ('He was just a jerry') revealed the story of the German Wehrmacht soldier Karl-Heinz Rosch during the occupation of the Netherlands in the Second World War, who rescued two Dutch toddlers but was killed himself.