An 89-year-old heir convicted of helping himself to his mother's fortune appears to be on the verge of going to a New York prison after years of appeals.

Anthony Marshall was due in court Friday afternoon. His lawyer, Kenneth Warner, said Thursday that Marshall would have to surrender because an appeals court had turned down a request for bail during further appeals.

Marshall was convicted in 2009 of stealing millions of dollars from his late mother, philanthropist Brooke Astor. He continues to deny the allegations.

The case has had lots of legal maneuvering, and it's not clear whether Marshall may have further avenues to try to forestall his one-to-three-year prison term.

His co-defendant, former lawyer Francis Morrissey Jr., was led away to prison Thursday.