Attorney Peter Kelly made the revelation Wednesday during a hearing to decide whether Leatrice Brewer is entitled to a share of the estate.
Brewer's bid hinges on whether her case applies to New York's "Son of Sam" law that bars criminals from profiting from their crimes.
A judge at the Long Island hearing notes that because she was never convicted, Brewer may not be subject to the law. A ruling is expected later Wednesday.
The money comes from lawsuits the fathers settled with Nassau County over claims that social services workers failed to properly monitor Brewer.
