Federal agents stopped the main target of the ill-fated Operation Fast and Furious in May 2010. After they questioned him, he disappeared back into Mexico, and the program went on to spiral out of control. By Richard A. Serrano, Washington BureauMarch 19, 2012 Reporting from Washington— Seven months after federal agents began the ill-fated Fast Read more about Gun-tracking operation caught top suspect, then let him go[…]