In a nutshell, what did this Guy do?
He made a lot of money as an expert witness in child custody cases. He had a disciplinary record from the 1980s that he managed to get sealed. Many of the decisions based on his ‘expert witness testimony’ are now being questioned and reversed.
Greenberg was just another evil malevolent servant of satan who profitably conspired with the legal system to destroy the lives of the good and decent.
Nothing especially extraordinary or unusual about him.
Installed a peek camera in his employee bathroom was how he got caught.