It cost UW-Madison about $43,700 to hire a retired Dane County Circuit judge to lead two inquiries into John Chadima, the senior associate athletic director who resigned earlier this year amid a sexual assault allegation. On Tuesday, the university released invoices submitted by Patrick Fiedler, now an attorney with the law firm Axley Brynelson.Three other investigators who worked with Fielder on the first inquiry were paid $11,900. Fielder worked with two detectives in the second investigation, but the university could not produce those billing records Tuesday.