Tim - I have not seen the book Scales of Justice, but I will have to look it up.
Christina was aligned with the defense during the trial, and so would have been anti-Dupree.
I forget the details, but she may have been hired by the defense as some sort of consultant, but after the trial, had an epiphany and realized his true guilt.
This has happened to many people, including Joe M.
After his book came out, many people became aware of the details and evidence for the first time.
Before that is was a one page article with a photo of a handsome young doctor and his dead family. Many people felt sorry for him.
Joe's book allowed people to really understand what happened. It is a true classic.
He told the story as it happened, using first hand testimony, and real sourced evidence.
He let the reader decide what happened.
Anyone who reads that book and still has doubt is willfully blind.

and so much more Tim.
Colettes blood on his shirt pocket BEFORE it was ripped.
His bloody footprint, in Colettes blood,  (while carrying something heavy) LEAVING Kristen's room.