Actress Pallavi Joshi said that she and husband Vivek Agnihotri researched for 'The Kashmir Files' for more than four years. "We went to...USA, UK, Germany, Singapore, Jammu and Kashmir, Pune, Thailand, Delhi...wherever we could find first family of the victim...whose father was murdered, whose mother was raped, children who saw their parents being murdered...We have met those people," she added.