Drew Peterson's attorney Joel Brodsky does damage control on morning chat shows

Drew Peterson's attorney Joel Brodsky appeared Friday on network morning news shows to call the Will County State's Attorney's evidence "at best a weak circumstantial case."

"I think the state's attorney has been under tremendous political pressure to bring a charge," he told a reporter on CBS's "The Early Show."

Brodsky said that he hasn't been able to speak to Peterson, who was arrested Thursday afternoon near his Bolingbrook home on charges he murdered his third wife, Kathleen Savio. His fourth wife, Stacy Peterson, disappeared in October 2007 in what police called a potential homicide.

Brodsky told a "Good Morning America" reporter that Peterson passed a polygraph test when questioned on details of Savio's suspicious death.

"He passed that polygraph exam 100 percent," he said.

Peterson is being held on a $20 million bond in the Will County Jail and is expected to appear via close circuit television in court Friday afternoon.

When arrested, Peterson cracked, "I should have returned those library books."

Brodsky explained Friday that humor was a coping mechanism for the former Bolingbrook cop.

"The way he reacts to pressure is with comedy," Brodsky said. "He's done this even when he's been involved in hostage crises" (as a police officer).

Brodsky said he was sure Peterson was holding up behind bars.

"Drew is a tough guy," he said, adding that the two have been preparing for Peterson's arrest.