Daya Nayak is a police officer from Maharashtra, India.
 He joined Mumbai Police in 1995, and rose to fame as an encounter-specialist in the late 1990s.
 As a member of the Detection Unit, he gunned down more than 80 gangsters of the Mumbai underworld.
 In 2006, he was temporarily suspended, based on allegations of criminal links and disproportionate income by a journalist with underworld links.
 The Anti-Corruption Bureau could not find any evidence against him, and he was reinstated by the Mumbai Police in 2012.
 He was transferred to Nagpur in January 2014, and suspended in July 2015 after he reportedly declined to join his new posting at Nagpur fearing his family’s safety.
 The transfer order was canceled in August 2015, and Nayak was reinstated in January 2016.
Akhil Bharatiya Sena ("lit."
 All India Army) is a political party in India.
 Founded in 1997 and led by the Mumbai mafia don and contract killer Arun Gawli (alias 'Daddy').
 Gawli had earlier been close to the Shiv Sena supremo, Bal Thackeray, but in 1996 a bloody feud surged between them when Arun Gawli mercilessly slew several Sena party legislators and party workers.
 Gawli organized ABS as a counterwight to SS.
Dilip Kohak (1966-1991) was a notorious Indian gangster who used to work for the D-Company, an international crime syndicate of the Mumbai underworld led by Dawood Ibrahim.
 He was killed in an encounter at the 1991 Lokhandwala Complex shootout by the then Additional Police Commissioner of Mumbai, Aftab Ahmed Khan, at the age of 25.
 He was portrayed by Tusshar Kapoor in the Bollywood film Shootout at Lokhandwala.
Detection Unit consisted of several high-profile officers of Mumbai Police.
 The squad primarily dealt with members of the Mumbai underworld and other criminal gangs.
Ferry Wharf aka Bhaucha Dhakka was built by Lakshman Hari Chandarjee Ajinkya(1789-1858) .
 He belonged to the Pathare Prabhu community (one of the original inhabitants of Mumbai).
He was affectionately addressed as Bhau or big brother by the local people.
 His family had estates at Naigaum and Parel and he worked as Chief Clerk in the Gun Carriage Factory in Colaba.
 Information given in the Govt.
 Archives and in the Marathi book ‘Pathare Prabhuncha Itihaas’ by Pratap Velkar reveal that Mumbai did not have a regular pier or wharf till 1835 for either goods or passengers.
 The government started leasing out land on the Bombay frontage to private individuals to build wet docks and basins.
 Laksman Hari Chandarjee Ajinkya alias ‘Bhau’ was the first local to take this opportunity.
 He thus constructed Mumbai’s first wet dock in 1841 for the convenience of the passengers and incoming ships to load, embark and berth.
 These included Carnac and Claire bunders.
 Today, the passenger terminal at the Bhau-Cha-Dhakka is still used to ferry people to Mora and Rewas for their onward journeys to Uran and Alibag.
Arun Gulabrao Ahir or Arun Gawli is an Indian politician , underworld don and former gangster.
 Gawli and his brother Kishor (Pappa) entered the Mumbai underworld in the 1970s when they joined the "Byculla Company", a criminal gang led by Rama Naik and Babu Reshim, operating in the central Mumbai areas of Byculla, Parel and Saat Rasta.
 In 1988, after Rama Naik was killed in a police encounter, Gawli took over the gang and began operating it from his residence, Dagdi Chawl.
 Under his control, the gang controlled most criminal activities in the central Mumbai areas.
 Throughout the late eighties and nineties, Gawli's gang was involved in a power struggle with Dawood Ibrahim's D-Company gang.
 Gawli is also the founder of the Akhil Bharatiya Sena political party based in Maharashtra.
Moshe Levin (1897–1943), alias 'Batlan' and 'Elisha', was a Jewish socialist.
 He was a member of the Jewish Communist Party (Poalei Zion) in Russia, before arriving in Palestine in 1919, where he joined the Socialist Workers Party.
 Levin contested on the 1920 Histadrut election on the list of the party, under the alias 'L. Elisha'.
 When the party was divided in 1922, he became a leader of the Palestinian Communist Party, along with Menachem 'Oskar' Finkelstein.
 After the reunification of the party into the Palestine Communist Party, he voiced opposition towards the 'Arabization' efforts inside the party.
 In 1928 he was deported to Poland.
 During the Second World War, he shifted his residence to the Soviet Union.
Satya 2 is a 2013 Indian crime film, simultaneously shot in Hindi and Telugu language.
 The film was directed by Ram Gopal Varma with production design by Saini S. Johray.
 The film stars Puneet Singh Ratn (Hindi), Sharwanand (Telugu), Anaika Soti, Aradhna Gupta and Mahesh Thakur in lead roles.
 The film tells the story of Satya, an immigrant who comes to Mumbai aiming to refashion the mumbai underworld.
 The film is the fourth installment of the "Gangster Trilogy."
Manohar Arjun Surve (8 August 1944  – 11 January 1982), popularly known as Manya Surve, was one of the dons who made an impact in the Mumbai underworld.
 He was adarsh singh's chela Being a Hindu, he was denied just two years, his gang rose to such prominence that Pathans, who ruled the underworld for over two decades, sought his help to eliminate the leader of their arch rival gang, the Konkani speaking Kaskar group.
 It was headed by Dawood Ibrahim's elder brother, Sabir.
 Manya was known for his dare devilry and strategic planning.
 For Manya, it was a clear shot to success.
 The top gang of the city had come asking him for help and in doing so he would eliminate the other.
 The first educated Hindu gangster, who hailed from an area called Agar Bazaar in the suburbs of Dadar.
 Manohar Surve, a young man, fresh Kirti College got implicated in a murder that he did not commit and was sentenced to life in Yerwada Jail.
Rajan Mahadev Nair (died 30 September 1983), popularly known in the Mumbai underworld by his moniker Bada Rajan (literally "Elder Rajan") was an Indian mobster and underworld don from Mumbai, who operated a gang active in Mumbai's eastern suburbs of Ghatkopar, Tilak Nagar and Chembur.

Question: Which contract killer that goes by alias 'Daddy' entered the Mumbai underworld in the 1970's?
Answer: Arun Gawli