Minutes after a Berlin court sentenced a Chinese man to five years in prison for aiding and abetting aggravated rape and sexual coercion, two women who had sat through the trial hugged each other and cried. But the case left one of those women, named Kristina, balancing mixed emotions as she struggled to reconcile her desire to see the perpetrators punished and questions about what justice really meant in a case of this nature. The 32-year-old, who was studying medicine, was jailed for five...