In 1957, the body of a young boy was found wrapped in a blanket and stuffed inside a cardboard box in Philadelphia. No one knew who he was. For over 60 years, he was simply known as “America’s Unknown Child.” In Episode 20 of Threads of Truth, we unravel the haunting case of The Boy in the Box, from early suspicions and dead ends to the recent breakthrough in identifying him through DNA, and the lingering questions that still surround his tragic story.