[ by Melanie Gretchen ] A second SEC deputy is leaving the fight against insider trading in corporate America for private practice.  A lawyer who also served as a special prosecutor during the criminal investigation and trial of Galleon Group founder Raj Rajaratnam will join the other side of the table, to counsel clients on matters before the SEC going forward. Recent Trend. Andrew Michaelson will join Boies, Schiller & Flexner LLP as a partner in May, where he will also counsel clients in white-collar defense and civil litigation.  He was previously employed at the firm out of law school in 2003 before joining the SEC 5 years ago. Mr. Michaelson's exit follows that of Jonathan Streeter, who served as lead prosecutor in the Rajaratnam case.  After Rajaratnam was convicted of multiple counts of conspiracy and securities fraud last year and sentenced to more than 11 years in prison - the longest sentence ever imposed in an insider-trading case - Mr. Streeter left to join law firm Dechert LLP. What the SEC is Losing. During Mr. Michaelson and Mr. Streeter's time at the SEC, 58 guilty pleas or convictions have been secured out of 66 people charged with insider trading in the broad crackdown.  A native of Weston, Conn., Mr. Michaelson, 36, was named a special assistant U.S. attorney in April 2008, before transitioning back to the SEC in January.  He is a graduate of Princeton University and Harvard Law School. For further details, go to [WSJ, 3/31/12].