Question: Pulan Visaranai is a 1990 Tamil language film directed by R. K. Selvamani, the  character of the antagonist Dharma (played by Anandaraj) is loosely based on which serial killer, what's the nickname of Indian serial killer Gowri Shankar?

Context paragraphs:
Makkal Aatchi: Makkal Aatchi is a 1995 Tamil language Indian film directed by R. K. Selvamani.  The film features Mammootty in the lead role and Roja, Aishwarya, Anandaraj and Livingston in supporting roles.  The movie was dubbed in Malayalam as "Ente Naadu".

Honest Raj: Honest Raj is a 1994 Tamil language action film directed by K. S. Ravi.  The film features Vijayakanth, Gouthami, Aamani and Devan in lead roles.Through this film Devan gain fame in negative roles in Tamil Film industry.  It marked the debut of Ravi K. Chandran in Tamil cinema.  The film, produced by Thiagarajan had music composed by Ilaiyaraaja released to positive reviews on 14 April 1994.  It was dubbed in Telugu as "Police Commando".  The film's title is taken from Vijayakanth's earlier film, "Pulan Visaranai".

Pulan Visaranai: Pulan Visaranai (English: Investigation ) is a 1990 Tamil language film directed by R. K. Selvamani.  The film features Vijayakanth in lead role.  The film, produced by R. Sundar Raj and S. Raveendran, had musical score by Illayaraja and was released on 14 January 1990.  The film was a blockbuster and was considered to be one of the best crime thrillers of its time.  It was remade in Hindi as "".  The character of the antagonist Dharma (played by Anandaraj) is loosely based on the serial killer Auto Shankar.  Telugu dubbed version "Police Adhikari" was also successful.

Ravan Raaj: A True Story: Ravan Raaj: A True Story is a 1995 Hindi-language Indian feature film directed by T.Rama Rao, starring Mithun Chakraborty, Madhoo, and Aditya Pancholi and is centred on kidney smugglers and a serial killer.  The film is a remake of Tamil blockbuster Pulan Visaranai starring Vijayakanth.  It was a Hit film at the box office.

Lalitha Kumari: Lalitha Kumari is an Indian film actress who is the daughter of Tamil actor C. L. Anandan, who starred in many films, such as "Vijayapuri Veeran" and "Kaattumallika" and the younger sister of Disco Shanthi.  She has starred in many movies in the early nineties with the likes of Goundamani, Senthil and other senior actors.  She has also played major roles in films like ‘Manadhil Urudhi Vendum’, ‘Pudhu Pudhu Arthangal’, ‘Pulan Visaranai’ and ‘Sigaram’.  Lalitha Kumari has performed in more than 30 films and has made her mark in Tamil industry.

Gowri Kalyanam: Gowri Kalyanam (English: "The Marriage of Gowri") is a 1966 Indian Tamil language film, directed by K. Shankar and produced by G. V. Saravanan.  The film stars Jaishankar, Jayalalithaa, Ravichandran, Sheela and Nagesh in lead roles.  The film had musical score by M. S. Viswanathan.

Captain Prabhakaran: Captain Prabhakaran is a 1991 Tamil-language Indian action film directed by R. K. Selvamani.  It features Vijayakanth in the lead role.  It also features Mansoor Ali Khan, Rupini, Livingston and Ramya Krishnan, while R. Sarathkumar appears in a small role.  It was Vijayakanth's 100th film, after which he earned the nickname "captain".  The character of the antagonist Veerabhadran, played by Mansoor Ali Khan, is loosely based on the forest brigand Veerappan.  The title of the film was inspired from Velupillai Prabhakaran, the leader of the Liberation Tigers of Tamil Eelam.  The film was a commercial success upon its release and became a blockbuster at the box office.  It was also dubbed in Telugu as "Captain Prabhakar".

Adimai Changili: Adimai Changili is a 1997 Tamil language film directed by R. K. Selvamani.  The film features Arjun and Roja in lead roles whilst Rambha, Anandaraj and M. N. Nambiar play supporting roles.  The film fared poorly at the box office after it opened in September 1997.

Pulan Visaranai 2: Pulan Visaranai 2 is a 2015 Tamil language film directed by R. K. Selvamani and produced by Ibrahim Rowther.  It stars Prashanth, Karthika in lead roles with R. K. and Pyramid Natarajan playing pivotal roles.  The film which was a sequel to 1990 film "Pulan Visaranai" began production in 2006 and went through production troubles before releasing on 30 January 2015.

Auto Shankar: Auto Shankar (January 21, 1954 – April 27, 1995) is the nickname of Indian serial killer Gowri Shankar.

Supporting paragraphs: Pulan Visaranai Auto Shankar
Answer: Auto Shankar