This article examines the interpretation and application of relevant provisions of the German Code of Crimes against International Law (CCAIL) and the German Criminal Code (GCC) to the slave trade and slavery conduct committed against the Yazidi by the Islamic State of Iraq and the Levant (ISIL, IS or Da'esh). Specifically, the article takes an intersectional approach to reviewing in detail the cases of Sarah O (Higher Regional Court of Düsseldorf) and Taha Al J (Higher Regional Court of Frankfurt) while drawing observations from other German cases concerning slavery crimes against the Yazidi. These were in the majority, if against German nationals, conducted under the principle of active personality or, in the alternative, under the principle of universal jurisdiction. The article shows how German prosecutors and courts did not shy away from creatively grappling with slave trading, slavery and trafficking conduct committed by ISIL.Cases, such as Nadine K, demonstrate a positive evolution towards cumulative charging and convictions that afford comprehensive legal redress to persons affected by the slave trade, slavery and trafficking. Still, the absence of the slave trade as an enumerated provision of crimes against humanity and war crimes in the CCAIL can be felt and must be rectified to realise legal protection as envisioned by customary international law.