Conversation so far:
How many appointees acted as defendants?
In 2000, Giuliani appointed 34-year-old Russell Harding, the son of Liberal Party of New York leader and longtime Giuliani mentor Raymond Harding.
Did he appoint anyone else?
In a related matter, Richard Roberts, appointed by Giuliani as Housing Commissioner and as chairman of the Health and Hospitals Corporation, pleaded guilty to perjury.
how many defendants were there?
Giuliani was a longtime backer of Bernard Kerik, who started out as a NYPD detective driving for Giuliani's campaign.
What was he on trial for?
Kerik then pleaded guilty in 2009, in a New York district court, to eight federal charges, including tax fraud and false statements.
What was Russell Harding on the stand for?
In 2005, Harding pleaded guilty to defrauding the Housing Development Corporation and to possession of child pornography.
Were there other defendants?
CANNOTANSWER.
Are there any other interesting aspects about this article?
After Giuliani left office, Kerik was subject to state and federal investigations resulting in his pleading guilty in 2006.

Question: What did he plead guilty to?
Self-contained rewrite: What did Bernard Kerik plead guilty to?