An attorney who was once suspended from practicing law pleaded not guilty Friday to face charges that he helped Brooke Astor’s son loot the philanthropist’s $198 million estate.

Francis X. Morrissey Jr., 65, a trusts and estates lawyer, faces charges of forgery, criminal possession of a forged instrument, scheme to defraud and conspiracy in connection with changes made to the socialite’s will. Prosecutors claim he forged Astor’s name when she was too weak to sign for herself.