Santiago Meza Lopez, who has been dubbed the 'Stew maker' ( "El Pozolero" in Spanish), confessed to disposing of at least 300 bodies over a decade by dumping them in graves and pouring acid on them to let them dissolve underground. This episode's title character is similar to the real person.
The Farmer's Parable that Red (James Spader) tells The Stewmaker and Lizzy (Megan Boone) is essentially the premise of The Outlaw Josey Wales (1976).
The Stewmaker's dog (a mastiff type) has had his ears cropped. Unfortunately this practice is still legal in the vast majority of states in the US.