NEW YORK (AP) -- A Manhattan appeals court is set to hear arguments that could determine whether philanthropist Brooke Astor's 88-year-old son goes to prison.
Arguments were scheduled Thursday in the case of Anthony Marshall.
He was convicted in 2009 of exploiting his mother's mental frailty to plunder her $200 million fortune.
Astor was 105 and had Alzheimer's disease when she died in 2007.
Marshall says he had legal permission for the financial decisions he made for his mother. He says she was mentally competent when she changed her will.
He also argues that the trial judge did not sufficiently explore a juror's claim that she felt intimidated during deliberations.
Marshall was sentenced to one to three years in prison. He's free during his appeal.