Within 24 hours of becoming a high-profile figure at a protest in Iran, 16-year-old Nika Shahkarami was dead. This investigation pieces together the last night before her death. (warning: distressing images) » Sign up for our newsletter KnowThis to get the biggest stories of the day delivered straight to your inbox: https://go.nowth.is/knowthis_youtube » Subscribe to NowThis: http://go.nowth.is/News_Subscribe
