Listed below are just a few of the hundreds of thousands of perfect murders in America that were never solved. I haven't included any case from the 1970s on because some of them could still be solved.
Evelyn Hartley. On October 24, 1953, Evelyn was babysitting in her hometown of La Crosse, Wisconsin when she was abducted. Blood was found at various locations inside the house and furniture was knocked over, indicating that the 15-year-old had fought hard for her life. The baby she was watching lay undisturbed in her crib. It was apparent that someone had broken into the home through a basement window, attacked Evelyn, and dragged her out into the street to a waiting vehicle. While serial murderer and weirdo Ed Gein is usually mentioned in connection with the abduction, he always denied it and none of her remains or other connecting evidence was found in his home. No good suspect was ever identified and the horrific case has never been solved.