 Nyorai kupfuurira kweiyi ndima - Muna 1933, pashure pokupiswa kweReichstag, mitemo mitsva yakagadzirirwa kukurumidza Adolf Hitlers kusimuka musimba yakatenderwa, zvichitungamirira kuna Renn, Carl von Ossietzky naErnst Torgler kusungwa pamwe chete muna January 1934. Renn akatongerwa kugara mujeri kwemwedzi 30, achishanda mwedzi 18. 