Henderson worked as the office manager and bookkeeper for the Rinos & Martin law firm.
According to the district attorney's office, from January 2003 to September 2009, Henderson allegedly wrote 122 company checks payable to herself, cash, personal credit cards, relatives or fake businesses and deposited them into her personal bank accounts.
Those checks added up to $480,000.
She is also accused of cooking the firm's financial books in an effort to conceal the theft.
Henderson faces up to 14 years in prison if convicted.
City News Service contributed to this report.