The main purpose of this legislation is to repeal two existing laws related to criminal justice in Washington, D.C. These laws are the District of Columbia Incarceration Reduction Amendment Act and the Second Look Amendment Act. The goal of the new legislation, titled the "JUSTICE in D.C. Act," is to change how the criminal justice system operates in the district, particularly regarding the treatment of violent offenders. Key provisions of this legislation include the repeal of the previous acts and the establishment of a new framework for supporting victims of violent crimes.