Miles Warren (Earth-364)

"Pay atention. Class is in session. Ever hear of "The Butterfly Effect"? How going back in time and stepping on one bug could wipe out the present? Just imagine, then, what I'm about to do to the future. Heard about how Earth's bumblebee population took a hit? How it might destroy our planet's entire ecosystem? That was me. I did it for a lark. Just to see if I could. This, however, this is work. And after months of bedbug outbreaks... You can thank me latter, Gotham... I believe I've finally cooked up the perfect batch. They're ready. C'mon, babies... Time to leave the nest. Or should I say nests? Thousand of locations around the city. Can you hear them? Scurrying? The pitter patter of their little feet? Nom. Nom. Nom. Good night, Gotham. Sleep tight. Have a bite. It's on me. I am the Jackal. And you... All of you... You are my children. My favorite children!"

- - Jackal broadcasting his plan to Gotham City

Professor Miles Warren was a engenius scientist who felt in obsession with Dick Grayson. After Grayson's death at the hands of the Joker, Warren transformed himself into the monstruous Jackal, attempting to enact his revenge on Batman by creating a clone of Bruce known as Arkham Knight.