According to the Chicago Tribune, the FBI wanted to know about a 2005 meeting the mayor had with the city planning staff, an alderman and a congressman. The planning staff had initially opposed the development. But after the meeting, they eventually reached a compromise with developer Calvin Boender.
Closing arguments in Boender's trial are set to begin Wednesday. He's charged with bribing Alderman Ike Carothers in exchange for zoning changes. Carothers resigned after pleading guilty to taking bribes from Boender.
A spokesperson for the city's law department told the Tribune, "The mayor cooperated with a request for an interview during the course of the investigation. There is no indication that he was or is anything other than a witness."
There's no suggestion that the mayor did anything improper.