Annette Bongiorno and four other former employees of Bernie Madoff found guilty

NEW YORK (CNNMoney) -- After nearly 6 months on trial, Bernard Madoff's former employees were found guilty of participating in the world's biggest Ponzi scheme.

Dan Bonventre, Annette Bongiorno, Joann Crupi, Jerome O'Hara and George Perez were hit with a litany of federal criminal charges, including conspiracy to commit securities fraud. Throughout the trial, they maintained that they didn't know that Madoff's firm was a front for a pyramid scheme that bilked investors out of $20 billion, despite working there for many years.

Ex-employee Annette Bongiorno testified that she spent years recording trades for Madoff that didn't exist, without truly understanding what she was doing.

"[Madoff] told me what to do. I typed." she said

Bongiorno lived part-time in Boca Raton.

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Madoff worked to secure the loyalty of his employees by being extremely generous, according to Dan Bonventre, who spent 40 years working for him.

"None of that was real," Bonventre testified. "Now I think Madoff was a terribly ill man. It's difficult to reconcile everything I knew about him for 40 years with everything I know now."

The trial also featured testimony from government witness Frank DiPiscali, Jr., who pleaded guilty and is awaiting sentencing. DiPascali said that fraud, cooking the books and lying to investors was widespread during his 33 years at Madoff's firm. Defense lawyers discredited DiPascali's testimony from , primarily because he was an admitted liar and therefore unreliable as a witness.

Madoff's scam came crashing down with this arrest in 2008. He pleaded guilty to running the Ponzi scheme in 2009 and was sentenced to 150 years. He is incarcerated in a federal prison on North Carolina.

The-CNN-Wire, The web team contributed to this report.
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