Delhi Police arrests three players - Sreesanth, Ankeet Chavan and Ajit Chandila - for "fraud and cheating". Amit Singh, a former Royals player, is also arrested as one of the bookies in question.
A week after the arrests, the crisis takes a new twist when Mumbai Police summons Gurunath Meiyappan, top official of Chennai Super Kings and BCCI president N Srinivasan's son-in-law, for questioning in connection with betting.
Mumbai Police formally arrest Gurunath.
Calls are made for Srinivasan to step down owing to a conflict of interest regarding Gurunath's situation.
Srinivasan temporarily recuses himself from the day-to-day administration of the BCCI, with Jagmohan Dalmiya put in charge of running the board's affairs.
Gurunath is granted bail on the condition that he does not leave India.
A two-member panel investigation finds "no wrongdoing" by IPL owners. "There is no evidence of any wrongdoing found by the judges against Raj Kundra, India Cements and Rajasthan Royals," Niranjan Shah, a BCCI vice-president, said.
Bombay High Court rules that the BCCI's two-member panel that investigated IPL owners was constituted illegally.
The Supreme Court of India issues notices to the BCCI, Srinivasan, his company India Cements, and Rajasthan Royals on an appeal challenging the Bombay High Court order from July for not appointing a fresh committee to probe the alleged corruption in the IPL.
Gurunath is chargesheeted by Mumbai Police under sections of the Indian Penal Code that deal with cheating and fraud, and section 130 of Bombay Police Act, which concerns cheating at games.