The Boy in the Box (Philadelphia, Pennsylvania, 1957)

On December 16, 1957, the naked body of an unidentified young boy, estimated to be between 4 and 6 years old, was discovered in a cardboard box in a residential area of Philadelphia. Despite extensive media coverage and a massive police investigation, the boy's identity and his murder remained unsolved until 2022. The case has become one of America's most enduring mysteries, often referred to as "America's Unknown Child."