MILWAUKEE (WTAQ) - A former Walker aide in Milwaukee County has replaced one of the lawyers for his embezzlement case.

The Journal Sentinel said John Birdsall withdrew because of a dispute over his role in defending Tim Russell. Former state prosecutor Dennis Krueger took Birdsall’s place.

Russell is scheduled to go on trial June 18th in Milwaukee County. He’s accused of stealing over $21,000 from an annual county event that honors Wisconsin veterans. And prosecutors said Russell took smaller amounts from two candidates for the Milwaukee County Board.

Russell was a former deputy chief of staff when Scott Walker was the county executive. Russell was among the first to be charged as part of an ongoing John Doe investigation into Walker’s ex-county aides.