Federal investigators have uncovered as many as 30,000 lost emails from Lois Lerner, the ex-Internal Revenue Service official at the center of the scandal surrounding the IRS's alleged targeting of conservative groups seeking tax-exempt status.

Molly Hennenberg explained on "America's News Headquarters Today" that IRS commissioner John Koskinen told Congress in June that the agency's IT experts could not recover the emails.

Now, the Department of the Treasury's Office of Inspector General (OIG) says it has found the data on the IRS's back-up equipment.

The IRS said in a statement, "As Commissioner Koskinen has stated, the IRS welcomes TIGTA’s independent review and expert forensic analysis. Commissioner Koskinen has said for some time he would be pleased if additional Lois Lerner emails from this time frame could be found."

Hennenberg said that the OIG is trying to convert the data into "readable format" before turning the emails over to Congress.

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