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.
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.