That led to Biden invoking Jack the Ripper, a yet-unidentified serial killer who may have murdered more than five women in England around 1888.

8. The Partner: Joseph Barnett The partner of Mary Kelly, Barnett had loved Kelly (or thought he had) and had tried to get her to quit her life of prostitution and heavy alcoholism.

Barnett was not there on the morning of November 9, by which time Jack the Ripper's murders had terrified the East End of London and filled every newspaper, but a neighbour said she heard Mary ...