Hedge fund billionaire Raj Rajaratnam was convicted of insider trading this morning. Gary Weiss on the man who put him away—and what this means for other Wall Street prosecutions.

The trial of hedge-fund billionaire Raj Rajaratnam has riveted the financial world and shined a light on the phenomenal success and insularity of the Indians, Pakistanis, Bengalis, and Sri Lankans flooding the American financial sector, writes Gary Weiss.