U.S. securities regulators' insider-trading case against former Goldman Sachs Group Inc board member Rajat Gupta was put on hold after federal prosecutors intervened, documents show. The intervention suggests continuing interest by U.S. Department of Justice prosecutors in Gupta, whom they had named as an unindicted co-conspirator in the criminal case against hedge fund billionaire Raj Rajaratnam. On May 11, a federal jury convicted Rajaratnam, founder of the Galleon Group, of 14 securities fraud and conspiracy charges related to insider trading, including in Goldman shares. Gupta, a former chief of consulting firm McKinsey & Co, has not been criminally charged. Gary Naftalis, a lawyer for Gupta, did not immediately respond to requests for comment Wednesday.