DALLAS — A longtime suburban Dallas bank employee has been indicted on charges of bank theft and fraud in a scheme prosecutors say continued for five years.

U.S. Attorney John Parker in Dallas says 54-year-old Susann Nelson, of Greenville, has surrendered to federal authorities and has made an initial court appearance. The indictment naming her was returned by a federal grand jury last week and unsealed Thursday.

According to the indictment, Nelson worked at the LegacyTexas Bank in Richardson from 1999 to 2015 and from 2006 managed the bank’s central vault. The indictment accuses her of embezzling cash from deposits from the Federal Reserve Bank beginning in January 2010 through February 2015 and making false entries in records to conceal the embezzlement.

Prosecutors have not disclosed the amount of money embezzled.