A book should be written exposing Malachi Martin's Marrano priesthood.
Gary Giuffre' had many exchanges with Martin, including a deadly encounter where Martin threatened Giuffre' if he continued to publicly pursue Cardinal Siri's cancelled papal election.
A week or so after a 1980's Siri conference in Cincinnati where wealthy trad backers wanted to go public with the invalidated 1958 Conclave, Giuffre' told Malachi Martin who was clearly agitated by the news.
Three days later, Martin contacted Giuffre'
to advise him Cardinal Siri was dead and in so many words, threatened him not to pursue the story.
So ... I almost forgot about that one, but Gary Giuffre is a very honest man and he would not make something like this up. There are one or two details about the story where it may have been his interpreation, such as where he claims Fr. Martin wrote something in one of his books to deliberately cast doubt on the Siri Theory by subtly changing it. That one detail I'm not sure about, since Fr. Martin could have just included a version of the story in his just because he thought it would heighten interest and sell more copies ... and if he changed it slightly, he constantly did that as a matter of course. But the phone call thing, and there was some death related to docuмent that he was going to receive from someone in France, if I recall.
But, overall, if Gary Giuffre said that something happened, then he's a very honest man, would not lie ... so long as you keep in mind what he's relating as fact and what he might be putting an interpretatio on. I can't quite recall the details of the phone call and the death ... but it was in fact striking.