Exclusive: Ald. Dick Mell secretly owned share of Joliet landfill that sparked feud with Blagojevich, lawsuit claims

The Chicago Sun-Times reports:

A felon convicted of bribing a public official says he and Ald. Richard Mell (33rd) were silent partners in the Joliet landfill that spurred a nasty family feud with Mell’s son-in-law, then-Gov. Rod Blagojevich, according to allegations in a lawsuit obtained by the Chicago Sun-Times. Mell has long denied having any financial interest in the landfill, which sold for $17.7 million in 2008. But the lawsuit filed by Robert Pruim Sr. and his son, Robert Jr., in Will County Circuit Court, accuses the powerful alderman of helping create the business, taking a one-third ownership stake and then conspiring to defraud the Pruims out of nearly $3.7 million when the sale occurred.

How many other Chicago Aldermen have secret ownership of projects?