IDI tend to doubt whether John and Patsy would have had the mental wherewithal to pen the ransom note with any such agenda, especially after their child had just died. In all honesty, John was legendary for taking control of things (something which I believe mildly irritated Patsy) and Patsy was a clever, accomplished woman. Both had wide experience. Individually they were good. Combine their resources and I think you have a powerful and capable unit. This, to me, is what tends to be over-looked. People talk about John OR Patsy writing the RN rather than BOTH. People talk about John OR Patsy doing the staging rather than BOTH. Which I think calls for a resurrection of your 'Cross finger-pointing defence' thread.
John Olsson "John Olsson has published in the Forensic Linguistics peer reviewed professional journal, is the author of a well-known university textbook, Forensic Linguistics (subtitled An Introduction to Language, Crime and the Law), now in its second edition."
"Olsson's forensic analysis has been submitted for evidence before the U.S. Supreme Court and a U.S. District Court. In addition, he has been admitted as an expert in an Australian Federal Court in connection with copyright infringement and has written a number of reports in connection with copyright and trademark infringement."
[ame="http://websleuths.com/forums/showthread.php?t=89672"]Testing RDI spin theory that PR and JR wrote the RN - Websleuths Crime Sleuthing Community[/ame]
due to localized distribution there's no evidence of dual (or more) authorship