August 2014: CBI files chargesheet against former telecommunications minister Dayanidhi Maran and his brother Kalanithi Maran and several others for allegedly influencing Aircel to sell its company to Maxis
February 2017: CBI special court drops all charges, saying CBI pressed charges due to misreading of official files
October 2013: CBI files FIRs against Aditya Birla Group Chairman K M Birla and former coal secretary P C Parakh for criminal conspiracy and misconduct
September-November 2013: Special court pulls up CBI for closing case in a hurry; directs agency to record former PM Manmohan Singh’s statement
September 2015: SC asks CBI for further probe
CBI investigates 33 coal allocation irregularities between 2006 and 2009, of which final reports are filed in 28 cases. A special court pulls up the CBI for shoddy investigations in various cases, including the ones involving Rajya Sabha MP Vijay Darda and former coal secretary H C Gupta that were re-opened by the investigating agency
October 1999-2000: CBI files chargesheet against Hinduja brothers, former defence secretary S K Bhatnagar and AB Bofors for criminal conspiracy, cheating, forgery under Indian Penal Code and other provisions
May-October 2005: Delhi High Court quashes charges against Hinduja brothers — Srichand, Gopichand and Prakashchand — and Bofors. A special court later reprimands CBI for causing exchequer loss of around Rs 250 crore in the case
April-October 2013: CBI tells special court that Rajesh and Nupur Talwar killed their daughter Aarushi and domestic help Hemraj in May 2008
October 2017: Allahabad HC acquits Rajesh and Nupur Talwar, saying they could not be held guilty based on evidences presented
October 2012: CBI files chargesheet against former Karnataka chief minister B S Yeddyurappa and others for alleged abuse of position and involving bribery of Rs 40 crore
October 2016: CBI special court acquits Yeddyurappa, 13 others, stating the prosecution failed to establish their guilt