A German woman who joined the Islamic State was sentenced to 10 years in prison on Monday for crimes against humanity after prosecutors said she stood by as a five-year-old Yazidi captive died of thirst in the Iraqi desert. 

Prosecutors in Munich said Jennifer Wenisch, 30, and her husband bought and enslaved a Yazidi woman and child in Mosul in 2015. They reportedly brought the mother and daughter to the IS-occupied Iraqi city of Fallujah, where they forced them to convert to Islam and regularly deprived the pair of food and water. The girl’s mother, who the court identified as Nora T., testified about their ordeal. 

“After the girl fell ill and wet her mattress, the husband of the accused chained her up outside as punishment and let the child die an agonizing death of thirst in the scorching heat," prosecutors said. "The accused allowed her husband to do so and did nothing to save the girl.”

The case represents a milestone in the pursuit of justice for Iraq’s embattled Yazidi religious minority. In August 2014, IS swept through the Yazidi ancestral homeland of Sinjar in northern Iraq and executed thousands of men, their bodies thrown in mass graves.