T. Ananda Krishnan, one of the world's wealthiest persons and Malaysia's richest man, could be in for some serious trouble if he doesn't cooperate with the CBI in the 2G scam case. The case relates to the one in which former telecom minister Dayanidhi Maran is a key accused. A special 2G court has issued Letters Rogatory (LRs) to four places on the CBI's request for Krishnan, who owns Maxis Communication which has a controlling stake in Aircel.