This episode covers the case of Albert Fish, a child rapist, murderer, and cannibal also known as The Grey Man, The Boogeyman, and the Werewolf of Wysteria who brutally murdered three children (and possibly more) between 1924 and 1928.

Sources:

https://en.m.wikipedia.org/wiki/Albert_Fish

https://www.ranker.com/list/albert-fish-facts/jacob-shelton

https://allthatsinteresting.com/albert-fish-letter

Deranged: The Shocking True Story of America's Most Fiendish Killer by Harold Schechter

I ...