 Complete the following phrase:  The use of gas vans by the Germans to murder Jews, Poles, Romani people, mentally ill people, and prisoners in occupied territories during World War II originated with the Nazi Euthanasia Program in 1939. Ordered to find a suitable method of killing, the Technical Institute for the Detection of Crime Kriminaltechnisches Institut der Sicherheitspolizei, abbreviated KTI of the Reichssicherheitshauptamt RSHA decided to gas victims with Carbon monoxide. In October 1939 the Nazis started gassing prisoners in 