WASHINGTON (AP) — The Internal Revenue Service did not follow the law when it failed to report the loss of records belonging to a senior IRS executive, the nation’s top archivist told Congress on Tuesday, in the latest development in the congressional probe of the agency’s targeting of conservative groups seeking tax-exempt status.

In June 2011, IRS executive Lois Lerner’s computer crashed, resulting in the loss of records that are sought in investigations into the agency’s actions. At the time, the agency tried to recover Lerner’s records, but with no success.