Portrait of a Killer: Jack the Ripper - Case Closed

After reading the Kay Scarpetta series I was hopping for something more... And I most apologize but I'm not convinced that Walter Sickert was Jack the Ripper... some of the must famous painters, writers or creativity people thinkers are indeed very troubled... and even diagnosed with heavy mental problems... they even can have the thought to kill someone and expressed it... but that doesn't qualify that they are really murderers/killers.
The scientific evidences are just that evidences and in some proofed cases they were also wrong.
As expressed by the author in the very beginning she wasn't convinced about the book, she was depressed... and that is expressed through out all along, even when she convinced herself (after all the scientific evidences accumulate that proof that Sickert was the culprit) that she was in the right to accomplish the task.