Fuentes del episodio: 

https://www.britannica.com/biography/Richard-Speck

https://www.chicagohistory.org/first-mass-murderer-richard-speck/

https://www.history.com/this-day-in-history/july-13/a-mass-murderer-leaves-eight-women-dead

https://www.youtube.com/watch?v=_anYJY67V6U&pp=0gcJCdgAo7VqN5tD

https://www.youtube.com/watch?v=mULmG4aMlc0

https://www.youtube.com/watch?v=WaUSUfCcr0Y

https://www.findagrave.com/memorial/5860192/gloria_jean-davy

https://www.findagrave.com/memorial/5860189/patricia_ann-matusek

https://www.findagrave.com/memorial/5860191/nina_jo-schmale

https://www.findagrave.com/memorial/5860193/pamela_lee-wilkening

https://www.findagrave.com/memorial/5860303/suzanne_bridget-farris

https://www.findagrave.com/memorial/5860300/mary_ann-jordan

https://www.findagrave.com/memorial/5860194/merlita_ornado-gargullo

https://www.findagrave.com/memorial/178402071/valentina_p-pasion

https://www.cga.ct.gov/PS97/rpt/olr/htm/97-R-0242.htm

https://www.cbsnews.com/chicago/news/killer-richard-speck-confessing-video-1996-report/

https://www.ebsco.com/research-starters/history/richard-speck

https://www.britannica.com/biography/Richard-Speck

https://www.history.com/this-day-in-history/july-13/a-mass-murderer-leaves-eight-women-dead

https://www.isba.org/ibj/2016/11/rememberingtherichardspecktrial

https://www.biography.com/crime/richard-speck

https://www.amazon.com/Crime-Century-Richard-Murders-Shocked/dp/1510708863

https://www.nbcnews.com/news/crime-courts/how-richard-speck-s-rampage-50-years-ago-changed-nation-n606211

https://tv.apple.com/us/movie/chicago-massacre-richard-speck/umc.cmc.460xkcfum7ynps1boyror1yuh

https://people.com/who-is-birdman-richard-speck-monster-the-ed-gein-story-11825570

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