Fred and Maria Manning's story involves love, treachery, greed, and murder. In a scheme nicknamed "the Bermondsey tragedy," they murdered Marie's affluent lover in cold blood and attempted to profit from their victim's fortune. New technologies and the newly established police units that had appeared throughout Britain in the past two decades would be their undoing.

Source Materials:

https://www.theministryofhistory.co.uk/short-histories-blog/bermondsey-horror

https://headstuff.org/culture/history/terrible-people-from-history/fred-maria-manning-victorian-murderers/

https://www.capitalpunishmentuk.org/mannings.html

https://thecrimewire.com/multifarious/The-Bermondsey-Horror