SEATTLE (AP) — Washington State Auditor Troy Kelley has been indicted by a federal grand jury on charges of filing false tax returns, obstruction of justice and possession of stolen property.

The grand jury returned the indictment Wednesday, and it was unsealed Thursday. Kelley is scheduled to appear at U.S. District Court in Tacoma this week.

Speculation has been swirling around Kelley, a Democrat elected in 2012, since federal agents searched his home last month. Kelley has insisted he did nothing wrong.

The charges concern a mortgage title services company that Kelley ran between 2003 and 2008.

Acting Seattle U.S. Attorney Annette Hayes said in a news release that Kelley lied in order to avoid paying taxes.

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