In an alternate timeline where classic slashers like Friday the 13th, A Nightmare on Elm Street and Halloween are actually historical accounts of the murderous monsters in those movies, a journalist and her two cameramen set out to follow and film the first killing spree of one of horror's best and brightest serial killers. No, not Crystal Lake's hulking, hockey mask-wearing Jason Vorhees, nor the man of everyone's nightmares, Freddy Krueger from Elm Street. The most villainous of them all reigns from a small town called Glen Echo -- and his name is Leslie Vernon.
Source：https://www.cbr.com/leslie-vernon-best-horror-movie-villain/
