3. Stella Nickel

http://www.pbs.org/newshour/updates/tylenol-murders-1982/
http://www.history.com/this-day-in-history/the-tylenol-murders
http://io9.gizmodo.com/the-horrifying-true-story-of-the-1982-chicago-tylenol-m-1675923381
http://murderpedia.org/female.N/n/nickell-stella.htm
http://www.history.com/this-day-in-history/woman-convicted-for-tampering-with-excedrin
http://www.cbsnews.com/news/bitter-pill-a-wife-on-trial/
http://gizmodo.com/a-terrifying-tale-of-greed-copycat-schemes-and-cyanid-1703120344

2. Matthew Milat

http://www.biography.com/people/ivan-milat-17169710
http://www.smh.com.au/nsw/matthew-milat-loses-bid-to-appeal-against-record-sentence-for-murdering-friend-in-belanglo-forest-20140912-10fuex.html
https://books.google.ca/books?id=fMEfDgAAQBAJ&lpg=PA11&dq=ivan%20milat%20arrested&pg=PA11#v=onepage&q=ivan%20milat%20arrested&f=false
http://thenewdaily.com.au/news/state/nsw/2014/04/25/20-years-milat-investigator-tells/
https://books.google.ca/books?id=-ISuCgAAQBAJ&lpg=PA48&ots=kzApuXAuyY&dq=ivan%20milat%20arrested&pg=PA48#v=onepage&q&f=false
http://www.smh.com.au/national/on-the-trail-of-a--serial-killer-20140413-36m7u.html
http://www.biography.com/people/ivan-milat-17169710
http://murderpedia.org/male.M/m/milat-ivan.htm
http://murderpedia.org/male.M/m/milat-matthew.htm
http://www.dailytelegraph.com.au/chilling-recording-of-milat-and-klein-during-murder-of-david-auchterlonie/news-story/e42e060091fba6f6b785fe4edb8eea9e?sv=b2821916c5bec6f130deab98ba7eb174
http://www.dailytelegraph.com.au/news/nsw/another-blood-stained-chapter-closes-as-second-murderous-milat-jailed/news-story/4b68bda4ba0a8ca23bcb9a3a6b155d7b
http://www.abc.net.au/news/2012-06-08/milat-relative-gets-30-years-for-axe-murder/4060442
https://www.vice.com/en_us/article/a-very-sad-walk-in-australias-serial-killer-forest
http://www.smh.com.au/nsw/back-into-heart-of-darkness-20100904-14v5r.html
http://www.smh.com.au/nsw/how-a-reclusive-kid-became-a-killer-20120608-2001q.html
http://www.smh.com.au/nsw/the-sickening-sound-of-an-axe-on-its-victim-a-plaintive-plea--and-silence-20120521-1z1dl.html
http://www.smh.com.au/nsw/matthew-milat-loses-bid-to-appeal-against-record-sentence-for-murdering-friend-in-belanglo-forest-20140911-10fuex.html

1.	Heriberto Seda

http://murderpedia.org/male.S/s/seda-heriberto.htm
http://www.nydailynews.com/archives/news/man-charged-zodiac-4-attacks-article-1.728762
http://www.nytimes.com/1996/06/22/nyregion/suspect-is-charged-in-4-zodiac-cases-in-queens.html
https://books.google.ca/books?id=xax_AAAAQBAJ&lpg=PT49&ots=H7et091_ZE&dq=heriberto%20Seda%20patricia&pg=PP1#v=onepage&q=patricia%20fonti&f=false