I thought it would be illegal for DM to write a book. It's not. It's only the "making a profit" part that is a against the law, and DM could theoretically write up his memoirs including his account of TB's murder:
http://www.victimsofviolence.on.ca/research-library/profiting-from-crime-laws-against/
RP attempted to sell his memoirs
http://www.cbc.ca/news/canada/british-columbia/pickton-book-amazon-outrage-1.3457989
...but Amazon refused to sell them after a deluge of complaints.
PB is also a published author
http://news.nationalpost.com/news/c...-publishes-despicable-violent-ebook-on-amazon
And of course there is the case of DS and CS, who are defending themselves against the court's finding of their guilt on the web
http://www.huffingtonpost.ca/2016/07/05/ezekiel-stephan-collet-stephan_n_10819200.html
The DS and CS case interests me the most, because of the judge's rather unusual ruling that they post the facts of the sentencing on their Facebook and webpage.
It makes me wonder if it were possible to force offenders to publish the sentencing ruling in their case as a forward to any material they might write.
You can't just silence those found guilty: imagine if GPM or DM had no right to speak publicly about their cases. But it is an interesting idea to force the accused to post the facts of their case as found by law, if they want to debate it.