|“||We're gonna get you for this! You're dead!||„|
In the story, Merrill and his gang are the town bullies of Castle Rock, Maine, and mostly pick on Gordie LaChance and his friends. At one point Gordie and the others go to look for the body of Ray Brower, a missing local boy. When they find the body, they run into John and his goons, who start harassing them and demanding that they take the body and the credit for finding it. When Gordie's friend Chris Chambers, the de facto leader of the boys, refuses, Merrill threatens him with a knife, showing he is willing to kill them for the body. Gordie pulls out a handgun and threatens to shoot unless makes Merrill backs off. Merrill and the others leave, vowing revenge.
Merrill returns in the novel as the secondary antagonist, by now a hardened criminal who has spent his life in and out of prison. He has a personal vendetta towards the local Sheriff Alan Pangborn, for arresting him. He returns to his hometown, and meets Leland Gaunt, who gives him a job delivering guns to his shop, in return for a map that's supposed to lead to a treasure of silver dollars. During the climax, Gaunt has Merrill team up with Danford "Buster" Keaton, who is killed by Deputy Norris Ridgewick. Gaunt later tries to corrupt Pangborn, by showing him a video convincing him that Merrill was the one who caused the accident that killed his son and wife, but it backfires when the video shows them wearing their seatbelts, and that's what really killed them. When Pangborn and Gaunt finally confront each other, Merrill pulls a gun on Pangborn's love interest Polly, threatening to kill her, only to get killed himself when Ridgewick shoots him in the head.
- In the film adaptation of Needful Things, he is replaced by character, Danforth Keeton.
- In the Family Guy episode "The Three Kings", which parodies Stephen King stories, he is portrayed by the late Adam West.