When in the Opposition, BJP leaders, including current Prime Minister Narendra Modi and Union finance minister Arun Jaitley, had belittled it as the ‘Congress Bureau of Investigation’. The Supreme Court famously likened it to a ‘caged parrot’, and former Bengal governor Gopalkrishna Gandhi coined the acronym ddt— Department of Dirty Tricks—to indicate that the CBI operated at the behest of the government of the day. Irony reigned when these themes got a fresh airing as the country’s leading investigative agency plunged headfirst into a welter of cases last week. Among them: