Rubuta ci gaba don wannan sakin layi - Gidan makamai da fursunoni suka tattara sun sami amfani a ranar 11 ga Afrilu 1945 lokacin da Gronau ya shiga cikin aikin "saki kai" tare da sauran fursunonin sansanin Buchenwald. A wannan lokacin, daga hangen nesa na duk wani mai gadi wanda bai gudu ba saboda rahoton ta'addancin da sojojin Red suka aikata da sauri daga gabas, gwamnatin Jamus ta kwashe sansanin, kuma akwai rahotanni na dubban fursunoni da aka tilasta su shiga cikin tafiye-tafiye, amma Gronau ba ya cikin waɗannan. Yaƙin ya ƙare
, a hukumance, a cikin makon farko na Mayu 1945. Heinz Gronau ya koma gida zuwa Leipzig, wanda sojojin Amurka suka 'yanta daga National Socialism a watan Afrilu 1945. Duk da haka, shugabannin Amurka da Tarayyar Soviet sun riga sun amince da juna a bayan yakin Jamus inda dukan Saxony za a gudanar da Soviet Union. A watan Yulin 1945 sojojin Amurka suka janye daga Leipzig da yankin da ke kewaye da shi, suna barin garin da Gronau ya koma a matsayin wani ɓangare na yankin Soviet. A lokacin 1945/46 an sanya shi a matsayin mai kula da ofishin kula da zamantakewar jama'a da na matasa.