It's unclear exactly why Blagojevich was detained at his Chicago home, although reports indicate it may be related to his alleged involvement in a pay-for-play corruption scheme. The Chicago Tribune reported on the probe's expansion before Blagojevich's arrest:Could the Governor have been using the selection of Barack Obama's replacement in the Senate for his own self interest? Hard to say with the sketchy details available thus far, but considering the multiple federal investigations he was involved in, it doesn't seem to be a big surprise to anyone.A three-year federal corruption investigation of pay-to-play politics in Gov. Rod Blagojevich's administration has expanded to include his impending selection of a new U.S. senator to succeed President-elect Barack Obama, the Tribune has learned.MSNBC confirmed that Blagojevich was taken into custody Tuesday morning.
Federal authorities got approval from a judge before the November general election to secretly record the governor, sources told the Tribune, and among their concerns was whether the selection process might be tainted. That possibility has become a focus in an intensifying investigation that has included recordings of the governor and the cooperation of one of his closest friends.