Sources

Lucy:

https://en.wikipedia.org/wiki/Elisabeth_Congdon

https://web.archive.org/web/20110815044247/

http://blogs2.startribune.com/blogs/oldnews/archives/166

http://tucsoncitizen.com/morgue/2008/11/19/103027-heiress-pleads-guilty-in-fraud-case-one-day-before-trial/

Trenerry, Walter (1962). Murder In Minnesota: A Collection of True Crime Cases. Minneapolis, MN: Minnesota Historical Society Press.

 

Kenyon:

https://en.wikipedia.org/wiki/Paul_Michael_Stephani

https://murderpedia.org/male.S/s/stephani-paul.htm

https://www.ranker.com/list/chilling-911-calls/christopher-shultz

https://youtu.be/bYVrbMQx77M

 

Amanda:

https://en.wikipedia.org/wiki/William_Williams_(murderer)

http://www.mnopedia.org/event/execution-william-williams

https://murderpedia.org/male.W/w/williams-william.htm

https://startribune.newspapers.com/image/76303402/?terms=william%2BWilliams%2BWednesday%2BFeb.%2B7%2C

http://www.startribune.com/feb-13-1906-minnesota-s-last-execution/257404541/

 

Additional Sources:

https://www.twincities.com/2016/02/12/from-the-archives-bungled-st-paul-hanging-was-minnesotas-last-execution/

http://www.executedtoday.com/2010/02/13/1906-william-williams-the-last-hanged-in-minnesota/

https://mnopedia.org/event/execution-william-williams

https://www.twincities.com/2016/02/12/from-the-archives-bungled-st-paul-hanging-was-minnesotas-last-execution/

https://artfulliving.com/travel-artfully-duluth/

http://www.citypages.com/news/blood-money-the-grisly-murders-at-duluths-glensheen-mansion/502097191

https://mylifeofcrime.wordpress.com/2015/05/06/monsters-among-us-roger-caldwell-killed-elisabeth-congdon-and-her-nurse-velma-pietila-he-was-sentenced-to-20-years-in-prison-his-wife-marjorie-congdon-was-acquitted-at-trial/ 

http://slphistory.org/congdon/

https://yikesmurderandstuff.com/2019/01/01/glensheen-mansion-murders-part-3/

https://truecrimeworld.tumblr.com/post/131236782459/paul-michael-stephani-was-an-american-serial

https://www.youtube.com/watch?v=A9GMARNwOsg

https://medium.com/true-crime-scary-stories/the-weepy-voiced-killer-ab41b10e7dd7

https://alchetron.com/Paul-Michael-Stephani

https://alchetron.com/Paul-Michael-Stephani

https://www.soundesign.info/2014/10/19/creepiest-sound-recordings-drones-3d-printed/