New Delhi, May 28 (ANI): Former Supreme Court judge Justice M.B. Shah, who is heading the Special Investigation Team (SIT) set up to investigate cases of black money has assured a speedy probe to uncover the matter. Meanwhile, Congress leader Digvijay Singh said that the SIT team was a decision of the Supreme Court and the newly formed government should not take credit. On Friday last week, the Supreme Court had given the Centre a week's time to notify a SIT to probe black money stashed in foreign banks by Indians.