CNBC | Morning Squawk - April 3, 2014: Feds open criminal probe into Citigroup.

In the news today U.S. authorities opened a criminal investigation into Citigroup ( C ) following a $400 million fraud at the bank's Mexican division, The New York Times reported, based on unnamed sources. The European Central Bank meets today to discuss the future of the Euro Zone's monetary policy , and IMF Head Christine Lagarde wants more aggressive stimulus from the central bank. (CNBC) Well-known short-seller Jim Chanos breaks down the ECB's decision and discusses China as guest host from 7 to 9 a.m. ET on CNBC's "Squawk Box." A soldier shot and killed three people before turning the gun on himself Wednesday at Fort Hood in Texas . Sixteen people were wounded. It was the same military facility where an Army psychiatrist went on a shooting spree five years ago. (NBC News) Running of the bulls? Market optimists may get another shot of good news from the jobless claims report that comes out this morning. (CNBC) A U.S. State Depa