After a stern order from the judge, Alex Zakharia, a 70-year-old South Miami heart surgeon, changed has promised to surrender his medical license as he originally agreed. In 2006, Zakharia was charged with fraud and perjury because of allegations that he exaggerated his credentials while testifying in a Michigan malpractice case. He agreed to retire by Dec. 31, 2007, but as of February 2008 he was still practicing.