Joining the Department of Justice Gaming Is Easy! The Department of Justice Gaming Is An Experienced Role play Community That Provides Genuine Role-Play Games On FiveM. You need to go to Rockstar Editor and select the Director Mode. As mentioned before, stealing a police car in GTA 5 is the first step towards becoming a police officer. How do you become a cop in GTA 5 Roleplay? While keeping our game play within the restricts of GTA V on console, we offer top notch law enforcement, employment, real estate, civilian role play and much more. Giving community members for more than 2 years the experience of the best role playing experiences on Grand Theft Auto V hosted on PlayStation 4. 2 How do you become a cop in GTA 5 Roleplay?.