The lease agreements between ISTHA, Wilton Partners, and various vendors have come under investigation by U.S. Attorney Patrick Fitzgerald. This investigation, reported on December 30, 2005, will determine if a conflict of interest existed between the lessees and a political fund-raiser for Illinois Governor Rod Blagojevich (Antoin Rezko). DuPage County State's Attorney Joe Birkett had also requested documents pertaining to these leases earlier in 2005. According to the "Chicago Tribune", the Subway restaurants in two oases are managed by the nephew of Tony Rezko, a controversial political fundraiser. In response, tollway spokesmen noted that Wilton Partners was selected during the administration of Governor George Ryan and that the lease gives Wilton discretion to select the individual vendors.