The 1920s saw a number of serial murderers in North America, but no one was more active than Earle Nelson, also known as "the Gorilla Killer or Dark Strangler." Nelson appeared to be able to kill at will as he wandered the country for more than a year, breaking into and out of suburban residences and boarding houses with ease.

Source Materials:

https://allthatsinteresting.com/earle-nelson

https://winnipegpolicemuseum.ca/wp-content/uploads/2021/03/the-stangler.pdf

https://www.therichest.com/shocking/15-facts-about-the-gorilla-man-earle-nelson/

https://cvltnation.com/the-butcher-baker-and-the-gorilla-killer-six-serial-killers-you-may-not-have-heard-of/

https://the-line-up.com/gorilla-man-murders-earle-leonard-nelson

https://murderpedia.org/male.N/n/nelson-earle.htm

Schechter, Harold