Chaos on the Highway and Vampire Madness

Sabina and Ursula Eriksson:
https://mentalhealthathome.org/2019/09/13/what-is-folie-a-deux/

https://www.mamamia.com.au/folie-a-deux-eriksson-twins/

https://www.vice.com/en/article/xwpzvj/the-twins-who-ran-into-traffic-before-stabbing-a-man-to-death

https://listverse.com/2018/03/26/10-highly-unusual-examples-of-folie-a-deux-or-shared-psychosis/

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

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

http://www.the13thfloor.tv/2016/11/10/the-bizarre-case-of-ursula-and-sabina-eriksson/

https://davetrott.co.uk/2019/09/nonsense-wrapped-in-posh-language/

https://www.bizarrepedia.com/ursula-and-sabina-eriksson/

Peter Kurten-
https://murderpedia.org/male.K/k/kurten-peter.htm

https://www.biography.com/crime-figure/peter-kurten

https://listverse.com/2018/02/02/10-twisted-facts-about-peter-kurten-the-vampire-of-dusseldorf/

https://allthatsinteresting.com/peter-kurten

https://gravereviews.com/2020/07/25/peter-kurten-the-vampire-of-dusseldorf/

https://vocal.media/criminal/serial-killer-deep-dive-the-vampire-of-duesseldorf

https://thecrimecolumn.com/peter-kurten-the-vampire-of-dusseldorf/