The FBI had the parlor under surveillance several times when Solis and Caldero visited, according to the affidavit. Federal authorities said Solis’ bank records do not show any payments to the parlor. At the same time, Caldero was lobbying the alderman on a variety of issues, including assistance for Elgin Sweeping, which was trying to get its $1 million bill from the city’s Water Department lowered, the affidavit said.