According to T. P. James, who was the murderer in "The Mystery of Edwin Drood" by Charles Dickens?

Dickens died before completing the novel. T. P. James published a version of the ending, claiming it was channeled. What I want to know is, who was the murderer in that version? According to the wiki page of the book, the culprit is hinted to be John Jasper, I just want to check if it’s the same to this author.

It’s an important question for me, because I believe in channeled works. I’m not a channeler myself, obviously, but I’m fascinated with paranormal, UFO (already said elsewhere), and, sometimes, the occult. I could always read it, and I will, but I must decide first if this channeler is genuine or a fraud. We can’t never be too sure about this.

Just check the wiki page of the book, paragraph “Hints and suspicions”, here:
https://en.wikipedia.org/wiki/The_Mystery_of_Edwin_Drood#Hints_and_suspicions

In other words, I appreciate any help you can give me in answering this question. Thank you for your time.

To download the book, here:

https://archive.org/details/mysteryedwindro00jamegoog/

For further information about the topics I talked about, look here:

https://en.wikipedia.org/wiki/Charles_Dickens
https://en.wikipedia.org/wiki/The_Mystery_of_Edwin_Drood
https://en.wikipedia.org/wiki/T._P._James