How Did Feds Listen in on Blagojevich?

Court records from the investigation into Illinois Gov. Rod Blagojevich are filled with recorded conversations of the governor allegedly offering to sell an appointment to President-elect Barack Obama's former U.S. Senate seat. How did the government find out what he was saying?Federal investigators tapped Blagojevich's home phone and bugged his personal office and a conference room in the Friends of Blagojevich campaign headquarters. Officials began listening to conversations in late October, the court documents say.

Source: abcnews.go.com

Former law enforcement officials and security experts, who were not familiar with the details of the investigation, said it may be easier than one would think to listen in on private conversations, even those of a governor.

Blagojevich was arrested Tuesday on corruption charges for allegedly scheming to sell an appointment to Obama's former Senate seat to the highest bidder. He was released on bond and has denied any wrongdoing.