mehta met sharma, who was in the team who caught the perpetrators. they spoke for months as mehta wanted her point of view in the crime. shah also met sharma for the preparation of the role. the series spans six days, covering the period between 16 december and 21 december, from the incident to the final arrest. the film went on the floor in january 2018 after taking permission from the delhi police and the victim's family. mehta decided not to show the rape on screen as he wanted "not to cross that line into exploitation." tailang's character was an amalgamation of different investigating officers, but he spoke to one police officer and used him as reference point.