With financial assistance from his father, Haarmann and his fiancée opened a fishmongery. Haarmann himself briefly attempted to work as an insurance salesman before being officially classified as disabled and unable to workMonsters of Weimar p. 28 by the 10th Army in 1904. As a result, his monthly pension was slightly increased. The same year, his fiancée, while pregnant with his child, terminated their engagement after he accused her of having an affair with a student. As the fishmongery was registered in her name, Erna simply ordered her fiancé to leave the premises.
witH fiNANcial AsSiSTanCE fRom HIs fatheR, haarmann And his fianCée opeNed A FIsHMongerY. haarManN HiMsELf brIeflY aTtEmPteD to woRk As an insURance sAlesmaN befOre beIng ofFiciAlly claSsified As DisAbLed and UnAblE tO woRKMoNsTers oF weiMar p. 28 bY thE 10th army in 1904. AS a resuLt, hIs moNtHLY pension Was sligHtlY increAsed. ThE samE yEar, hiS fiANCÉe, While pregnANT with his ChIlD, TerMinated TheIr enGagEmeNt afteR he aCcuSed HEr oF Having An aFfair wiTh a StUDeNt. as thE fishmongERY was regisTERed in HEr name, ErnA simPLy ORDered her FiAncÉ tO lEaVe tHe Premises.