The killer, who came to be known as the “Phantom of Heilbronn,” was actually the result of a critical forensic error.

Unlike mass murderers like those who shoot a large number of people in a public setting, such as a movie theater or campus, ...

Editor’s Note: This story contains discussions of rape or sexual assault that may be disturbing. Reader discretion is advised. If you or someone you know has been sexually assaulted, you can find help ...