Quattrocchi was accused of taking bribes to swing the 1980s Indian arms purchase deal in favor of Swedish arms manufacturers Bofors.
The case against Quattrocchi, known to be close to the family of late Rajiv Gandhi, who was prime minister in 1987 when the bribery scandal broke, has taken tortuous twists and turns after he was named in a CBI chargesheet as the conduit for the Bofors bribe in 1999.
Quattrocchi had managed to evade interrogation.
The nearest the CBI came to him was in February 2007 when Quattrocchi was detained in Argentina on the basis of an Interpol warrant.
But the CBI took time in translating documents that were to be presented in the designated court there and also put up a half-hearted effort towards his extradition. It finally lost the case for his extradition four months later.
In April 2009, the Interpol removed the red-corner notice issued against Quattrocchi after a request from the Central Bureau of Investigation.
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