A longtime Vedder Price office manager was charged with embezzling about $7 million from the firm in a decades-long false billing scheme involving her sister and two other accomplices, Illinois prosecutors say.

A yearlong investigation by the financial crimes unit of the state attorney’s office in Cook County resulted in the Friday arrest of Patricia Lapinski, 66, who worked as an office manager at Vedder Price for more than 30 years, according to firm. Also arrested were Lapinski’s sister, Deborah Acuna, 61, as well as James Bauer, 62, and David Leisen, 57.