A Martinsburg woman has admitted lying to a federal grand jury during an investigation of a law firm where she worked as the office manager.

U.S. Attorney William Ihlenfeld II said Wednesday that 52-year-old Nancy Burkhart pleaded guilty Monday to one perjury count.

Burkhart admitted giving false testimony to the grand jury in 2006 during a federal and state investigation of billings submitted by the firm to the state Public Defenders Service. Burkhart testified that she didn't know anything about a missing computer server, which she had helped a lawyer remove from the office.