Timeline: Hasan Ali case

January 2007: Income Tax department raided Hasan Ali Khan's residence in Pune, which revealed huge tax evasion and stashing black money in tax havens, including $8 bn in a bank in Zurich.

January 2007: Income Tax department raided Hasan Ali Khan's residence in Pune, which revealed huge tax evasion and stashing black money in tax havens, including $8 bn in a bank in Zurich.

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December 2008: Income Tax department (Mumbai) issued a show cause notice to Hasan Ali regarding tax evasion and black money.

March 3, 2011: Supreme Court pulled up the government for its inaction against Hasan Ali and black money hoarders.

March 4, 2011: Enforcement Directorate issued a 'Look Out' circular in all the airports against Hasan Ali to prevent him from leaving the country.

March 7, 2011: Enforcement Directorate conducts raid in 14 locations across the country and takes Hasan Ali in its possession for interrogation.