David Friehling, Bernard Madoff's accountant of almost 20 years pleaded guilty today to perpetuating Madoff's scheme and admitted that he failed to properly audit the convicted conman's investment advisory firm and helped him lie to the Securities Exchange Commission and the Internal Revenue Service. "In what was surely the biggest mistake in my life I placed my trust in Bernard Madoff," said Friehling, who was released on bail today. Click here to go behind the scenes of Brian Ross' investigation into Bernie and Ruth Madoff. Friehling expressed remorse and apologized to the victims "for the role I now know I played" in Madoff's operation and admitted that he did not independently investigate Madoff's claimed assets or perform any of the...