Madoff sentenced to 150 years for Ponzi Scheme

A U.S. judge is expected to sentence Madoff, 71, to an effective life term in prison during an emotional court hearing starting at 10 a.m. EDT, in which some of his defrauded investors will describe the shock of losing their life savings.

The swindler, who pleaded guilty to a slew of crimes in the same Manhattan federal court in March, will "speak to the shame he has felt and to the pain he has caused," said his lawyer, Ira Lee Sorkin, who has suggested a 12-year prison sentence.

"Given the enormous amount of funds he has stolen and the number of victims, the sentence is going to be very, very high," said Paul Radvany, a law professor at Fordham University in New York and a former federal prosecutor.

The 100 or so letters sent to the judge from customers and what 10 will say at the hearing could have "a great impact" at the sentencing, Radvany said.

Investigators do not know how much was stolen, according to court papers. About $13 billion has been traced to more than 1,300 customer accounts. The trustee winding down the Madoff firm has so far collected $1.2 billion to return to investors.

Prosecutors also say $170 billion flowed through the principal Madoff account over decades and that weeks before his December arrest, the firm's statements showed a total of $65 billion.

The hearing will be held in a ceremonial courtroom that accommodates 250 people. Two other rooms in the courthouse in lower Manhattan are being provided for defrauded investors and spectators to watch on closed-circuit TV.