In the book Monster, by Walter Dean Myers, there is a brief scene which shows Steve Harmon (the protagonist) being prepared for death by lethal injection. Like all literature, the reasoning behind this question is purely subjective. One view is that the lethal injection scene is included because, throughout the novel, Steve has both flashbacks and flash-forwards. He works through his situation playing out past and possible consequences to his life. The scene with the injection is a potential outcome for Steve given that he is on trial for being an accomplice to a murder. He faces the trial realistically, acknowledges all of the possible outcomes, while learning to deal with the internal and external conflict that arises with being on trial.