One lawyer's dark secret: Millions stolen from her elderly clients

They were elderly and vulnerable. And they had homes and retirement savings ripe for the taking.

For Barbara Lieberman, the temptation was too great.

A well-known elder law attorney, she knew how easy it would be to help herself to her clients' assets. All it took was a few strokes of a pen on a legal document and the money was hers.

For a decade, Lieberman stole with impunity. But her dark secret wasn't entirely safe.

The relatives of one of her elderly clients, Helen Hugo, suspected all along that Lieberman was corrupt — and that she wasn't acting alone.

Yet when they tried to expose her, no one would listen to them.

Find out what happened — and how other insiders like Lieberman are using the legal system to hide their crimes. Read our multi-part investigative series, "Betrayal of Trust."