Kammala jumla mai zuwa: Dan asalin Berlin kuma dan ƙarni na biyu na Jam'iyyar Kwaminis ta Jamus, Mielke na ɗaya daga cikin mutane biyu da suka kashe shugabannin 'yan sandan Berlin a 1931
Paul Anlauf da kuma Franz Lenck. Bayan ya sami labarin cewa wani mai shaida ya tsira, Mielke ya tsere daga kamawa ta hanyar tserewa zuwa Tarayyar Soviet, inda NKVD ta ɗauke shi. Ya kasance daya daga cikin manyan mutane a cikin halakar 'yan gurguzu na Jamus na Moscow a lokacin Babban Tsarkakewa da kuma cikin zalunci na wadanda ake zargi da anti-Stalinists a cikin Brigade na Duniya a lokacin yakin basasa na Spain.