Chapter 4 of Peter Smith's book "CSI Alberta: The Secrets of Skulls and Skeletons" is about Septic Tank Sam, and provides a few more details regarding evidence and theories regarding this case:
http://books.google.ca/books?id=02t7hcfXIOsC&pg=PA51&source=gbs_toc_r&cad=4#v=onepage&q&f=false
Bumping this very interesting link.
Adding a mp suggestion, fwiw.
http://www.doenetwork.org/cases/4143dmon.html
Norman Richard Welsh