Herbert Mehlhorn
... that SS officer Herbert Mehlhorn was involved in the camouflage of the mass graves of the Jewish victims at the Chełmno extermination camp?
... that <a href="./Schutzstaffel" id="mwCeo" rel="mw:WikiLink" title="Schutzstaffel">SS</a> officer <b id="mwCes"><a href="./Herbert_Mehlhorn" id="mwCew" rel="mw:WikiLink" title="Herbert Mehlhorn">Herbert Mehlhorn</a></b> was involved in the camouflage of the <a href="./Mass_grave" id="mwCe0" rel="mw:WikiLink" title="Mass grave">mass graves</a> of the Jewish victims at the <a href="./Chełmno_extermination_camp" id="mwCe4" rel="mw:WikiLink" title="Chełmno extermination camp">Chełmno extermination camp</a>?