5. The Atlanta Lover's Lane Murders

http://www.ourgeorgiahistory.com/ogh/Lover's_Lane_Murders
https://www.11alive.com/article/news/investigations/the-hunt/the-hunt-atlantas-hidden-serial-killers/85-486005491
https://books.google.ca/books?id=gijG7fSwvjAC&lpg=PA24&dq=The%20Atlanta%20Lover's%20Lane%20Murders&pg=PA24#v=onepage&q=The%20Atlanta%20Lover's%20Lane%20Murders&f=false

4. The Tube Sock Killings

https://unsolvedmysteries.fandom.com/wiki/Stephen_Harkins_and_Ruth_Cooper
https://unsolved.com/gallery/diana-robertson/
https://www.seattletimes.com/seattle-news/skull-discovery-revives-washington-murder-mystery/
https://www.theolympian.com/news/local/crime/article25296325.html
https://mja--inc--investigations.webs.com/apps/blog/show/41922650-let-us-not-forget-the-young-couples-murdered-
https://www.muckrock.com/foi/lewis-county-372/murder-investigations-1985-lewis-county-sheriffs-department-71800/

3. The Colonial Parkway Murders

https://books.google.ca/books?id=eW21tgEACAAJ&dq=The+Colonial+Parkway+Murders&hl=en&sa=X&ved=0ahUKEwjmlNjnwZXkAhWBMd8KHaj2CxwQ6AEIKjAA
https://www.13newsnow.com/article/news/local/colonial-parkway-murders-30-years-later-david-knobling/476693912
https://www.crimemuseum.org/crime-library/cold-cases/colonial-parkway-murders/
https://www.wavy.com/news/possible-developments-in-colonial-parkway-murders-family-says/
https://www.huffingtonpost.ca/2011/09/06/fred-atwell-colonial-parkway-murders-arrest_n_947121.html
https://wtvr.com/2018/07/23/authorities-have-potential-perpetrator-dna-in-colonial-parkway-murders-family-says/
https://wtkr.com/2018/07/22/family-authorities-have-dna-of-potential-colonial-parkway-murders-suspect/
http://www.coastalvirginiamag.com/July-August-2018/New-Book-Shines-a-Light-on-the-Mysterious-Colonial-Parkway-Murders/
https://www.investigationdiscovery.com/crimefeed/murder/is-the--colonial-parkway-killer--still-out-there-
https://www.13newsnow.com/article/news/local/colonial-parkway-murders-30-years-later-robin-edwards/476693317
https://www.13newsnow.com/article/news/local/colonial-parkway-murders-30-years-later-david-knobling/476693912

2. The Psychopath

https://ticotimes.net/tico_longform_post/costa-rica-serial-killer
http://costarecon.com/the-3-most-notorious-crimes-in-costa-rican-history/
https://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S1409-00152005000100003
https://nigelcawthorne.com/2016/03/mammoth-book-of-killers-at-large/

1. The Monster of Florence

https://www.cnn.com/2011/WORLD/europe/07/01/amanda.knox.author/index.html
https://www.telegraph.co.uk/news/worldnews/europe/italy/1400566/Monster-of-Florence-blamed-for-mutilations.html
http://www.sienanews.it/cultura/for-international-readers/the-monster-of-florence-case-reopened/
https://www.crimeandinvestigation.co.uk/crime-files/monster-of-florence
https://www.britannica.com/biography/Monster-of-Florence
https://www.thedailybeast.com/italys-scariest-serial-killer-returns
http://www.nbcnews.com/id/19313866/ns/dateline_nbc/t/monster-florence-profiled-fbi/#.XV4LouhKhPY
http://www.theflorentine.net/news/2008/07/monster-of-florence-be-witches-america/
https://www.theatlantic.com/magazine/archive/2006/07/the-monster-of-florence/304981/
https://www.theguardian.com/books/2009/jan/25/monster-florence-douglas-preston-mario-spezi
https://www.theguardian.com/books/2009/jan/25/monster-florence-douglas-preston-mario-spezi
https://www.thewrap.com/true-monster-florence-2354/
https://www.independent.co.uk/arts-entertainment/films/news/hunt-for-the-monster-of-florence-1657052.html
https://books.google.ca/books?id=2zUnXBLoN1gC&printsec=frontcover&dq=the+monster+of+florence&hl=en&sa=X&ved=0ahUKEwil4rWyw5XkAhVFZN8KHfOjAPwQ6AEIKjAA#v=onepage&q=the%20monster%20of%20florence&f=false
https://books.google.ca/books?id=OCW-LRmsmPEC&printsec=frontcover&dq=the+monster+of+florence&hl=en&sa=X&ved=0ahUKEwil4rWyw5XkAhVFZN8KHfOjAPwQ6AEIMDAB#v=onepage&q=the%20monster%20of%20florence&f=false
https://books.google.ca/books?id=Od4ijc_hdCMC&printsec=frontcover&dq=the+monster+of+florence&hl=en&sa=X&ved=0ahUKEwil4rWyw5XkAhVFZN8KHfOjAPwQ6AEINjAC#v=onepage&q=the%20monster%20of%20florence&f=false
https://www.youtube.com/watch?v=lzehZDboFW0