Anthony Marshall, the son of late philanthropist Brooke Astor, has lost an appeal that kept him out of prison after he was convicted of exploiting his mother's dementia to steal millions from her.
The state Supreme Court's Appellate Division ruled today that Marshall's conviction was based on legally sufficient evidence.
Appeals judges also rejected his argument that his age and illness should keep him out of prison.
Marshall received a sentence of at least a year, but was allowed to stay free on bail during the appeal.
It is not clear whether he will have to report to prison or if he will appeal further and remain free on bail.
Astor died in 2007 at the age of 105 and gave nearly $200 million to charity.