The Department of Justice is a branch of the United States government designed to enforce the law and to ensure fair and impartial administration of justice for all Americans. The Department is administered by the United States Attorney General, who is one of the original members of the cabinet.
Moses Hernandez, an employee of the Department, planned with David Aceveda, police captain of the Farmington district, to make a federal case against Detective Vic Mackey for police corruption. To achieve this, he offered Detective Terry Crowley a job in the Department of Justice home office of Washington, DC, among other things.
However, Crowley was killed by Vic Mackey during a raid after he learned he planned to incriminate him in criminal activities. Mackey received the information from the Assistant Chief of Poice Ben Gilroy, who had received the information through his connections in the Department of Justice.