As i've already stated, you should have highlighted this section of Mull's article:
"Some of the information used by the BBC came from the annals of the Catholic Church, which kept in-depth internal records of each case. Since these were internal, and hence secret (until recently), their veracity is held in high regard, as forgery would gain nothing. "
"...their veracity is held in high regard, as forgery would gain nothing." CAN HE BE SERIOUS? Nah, the church would never cover up evil now, would she?
I've got to give Mull credit, tho, for admitting that church provided "some" of the information. Looks like it must be the stuff you did highlight.