NMLP P-024090 · True-first precedence · minted 2026-07-04

Portrait of a Killer: Jack the Ripper—Case Closed

Patricia Cornwell · G.P. Putnam's Sons · 2002

US G.P. Putnam's Sons is the true first; nonfiction Jack the Ripper investigation arguing Walter Sickert as the killer.

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New Mexico Literacy Project — True-first precedence NMLP P-024090 for "Portrait of a Killer: Jack the Ripper—Case Closed" by Patricia Cornwell (https://newmexicoliteracyproject.org/id/point/p-024090, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).