The Olympic gold-medalist will head to Rio this summer with the hopes of becoming the first American boxer, male or female, to win back-to-back gold medals. Shields reveals to E:60 reporter Jeremy Schaap her tumultuous childhood, bouncing from home to home, surviving sexual assault, and now living among the 40,000 people below the poverty line in a city dominating headlines for a toxic water crisis in Flint, Michigan.