Goldman Sachs' director Rajat Gupta tipped off Raj Rajaratnam, an accused in insider trading scam, about a deal between Buffett-led Berkshire Hathaway and the Wall Street giant, before the public announcement. The Wall Street Journal said in a report citing people close to the situation, that at the height of 2008 financial crisis, Gupta told Rajaratnam, the founder of hedge fund Galleon, about a $5 billion investment in Goldman Sachs by Berkshire Hathaway, before a public announcement of the deal. "The revelation marks a significant turn in government's case against Raj Rajaratnam, the hedge-fund titan at the center of the largest insider-trading case in a generation," the report stated. The new disclosure stems from a government examination into whether the Goldman director, Rajat Gupta, gave inside information to Rajaratnam.