Kolaigaran (transl. Killer) is a 2019 Indian Tamil-language action thriller film directed by Andrew Louis of Leelai fame. The film stars Vijay Antony, Arjun and Ashima Narwal, while Nassar and Seetha play supportive roles. The music is scored by Simon K. King. Principal photography of the film commenced on 5 June 2018. The film follows an investigation in which a woman and her mother are suspected of murder after a disfigured corpse is found, while their neighbor claims to have committed it instead, much to the surprise of cops. The film was released theatrically on 7 June 2019. It opened to positive reviews and became a super hit at the box office.The movie is heavily inspired by the 2012 South Korean thriller Perfect Number which was based on the Japanese mystery novel The Devotion of Suspect X which had earlier been adapted in 2008 in Japanese as Suspect X. The movie was also loosely inspired by Agatha Christie's mystery novel The Body in the Library.