On March 20, the Supreme Court of the United States heard arguments about whether it is constitutional to sentence someone to life without the possibility of parole for a crime they committed as a juvenile-even homicide. Miller v. Alabama and Jackson v . Hobbs, two cases involving teenage boys who committed homicide, may turn the court's reasoning based on a new understanding about brain development, which indicates that children under 18 have a diminished capacity for understanding the consequences of their action. Evan Miller and Kuntrell Jackson, the petitioners in these cases, are two of the seventy three persons serving a life without parole sentence for a crime committed by 14 year olds.