his DNA analysis pointed to a different suspect, Aaron Kosminski, which also provoked criticism and controversy.The New York Times's December 2002 review by Caleb Carr was very critical, writing: Portrait of a Killer is a sloppy book, insulting to both its target and its audience. The only way for Cornwell to repair its damage will be to stay with this case, as she says she intends to, continuing her research, studies and tests for the years required to complete them thoroughly. Perhaps then she can then do what she claims to have done already — prove Walter Sickert's guilt decisively. Failing that, she should apologize for this exercise in calumny. 2017 In 2017, Cornwell published another book on the subject, Ripper: The Secret Life of Walter Sickert'' in which she uncovers what she believes to be further evidence for Sickert's guilt. See also Jack the Ripper conspiracy theories Walter Sickert References External links www.patriciacornwell.com Casebook: Jack the Ripper dismisses most of Patricia Cornwell's claims. "Cornwell Rips Sickert" --a web classic from 2003. 2002 non-fiction books G. P. Putnam's Sons books Jack the Ripper Non-fiction books about Jack the Ripper Walter Sickert