Madoff's former CEO in court Tuesday

Frank DiPascali, Bernie Madoff's former chief executive officer, is expected to plead guilty at a hearing Tuesday afternoon.

Details of the charges are not yet known. The hearing will take place at 3 p.m.

71-year-old Bernie Madoff pleaded guilty in June to charges that his secret investment advisory business was a multibillion-dollar Ponzi scheme.

The former Nasdaq chairman was sentenced to 150 years in prison.