Krozel said he was scared for his wife, who was suffering from an undiagnosed neurological disorder, couldn't talk or walk and was helpless without him. After agents showed up at his house 15 minutes after arresting then-governor Rod Blagojevich, Krozel said he was sure they were going to arrest him, too.

"I thought they were coming to take me away," Krozel said, looking emotional and misty-eyed after describing his wife's condition.

He said he lied to the FBI that morning and told agents he hadn't felt pressure to donate to Blagojevich in exchange for the governor passing a $6 billion tollway bill.

Prosecutors are trying to show that Krozel, who is testifying with immunity - meaning he can't get in trouble for anything he says on the stand - has good reason to avoid lying. The only way Krozel could be charged is if he lies during questioning.

Defense lawyer Aaron Goldstein jumped on Krozel's description of the FBI's first questioning.

"You were frightened of the FBI?" he asked a few different times. After answering "yes" more than once, Krozel answered firmly: "I was terrified."