NEW YORK - ( Dow Jones ) - Former star investment banker Frank Quattrone pleaded not guilty Tuesday to criminal charges of obstruction of justice and witness tampering .
Frank Quattrone , the former Credit Suisse First Boston technology investment-banking guru , reportedly pleaded not guilty Tuesday to charges of obstruction of justice and witness tampering .
The opposition would resort to rolling mass action " at strategic times of our choice and without warning to the dictatorship , " he said .