Drew Peterson, the ex-cop under investigation for his fourth wife Stacy Peterson's 2007 disappearance, has been jailed on two first-degree murder counts in the 2004 death of his third wife, Kathleen Savio, authorities said.
"I've been through hell," Savio's sister, Susan Doman, told ABC News amid Peterson's arrest. "Hopefully, he's gonna get what's coming to him."
Peterson, 55, was being held at the Will County Adult Detention Facility in Joliet, Ill., with bond set at $20 million, and could face 60 years in jail, Will County State's Attorney James W. Glasgow said.
"This is a grave and serious matter, and I think that's reflected in the bond," Glasgow told reporters.
"We are very confident in our case," he added.
Joel Brodsky, an attorney for Peterson, called the $20 million bond "excessive" and said he hoped to get it reduced. He noted that Peterson had passed two privately administered polygraph tests that suggested he did not kill Savio. Another attorney told The Associated Press that Peterson had an alibi for Savio's death.
Savio, 40, was found face-down in an empty bathtub in March 2004, her hair soaked with blood from an apparent head wound.
That autopsy determined Savio had drowned, Illinois State Police Capt. Carl Dobrich said.
An indictment handed down by a grand jury Thursday morning accused Peterson of "two counts of first-degree murder, one on the theory of intentional killing, the second [for] knowingly doing an act that can cause great bodily harm," said Glasgow, whose office will prosecute the case.
Peterson was arrested "without incident" in a traffic stop by a uniformed state trooper and plainclothes officers near his home in Bolingbrook, Ill., Dobrich said. He added that Peterson's four children were in the process of being removed to government care.
Andrew Abood, an attorney for Peterson, told The Associated Press the indictment was not a surprise because "there was tremendous pressure for the government to do something in this case."
He added Peterson had a "lock-tight alibi" because Peterson and Savio's teenage son said last month in a television interview that he was with his father at the time of his mother's death.
"I highly do not believe that my dad had murdered my mom," Thomas Peterson, 16, told CBS' "The Early Show." "Because, first off, he wasn't there. He was with us during that period of time."
Peterson, a former duty sergeant for the Bolingbrook Police Department, was the first officer to respond to the scene of Savio's death. His nearly-three-decade career in law enforcement ended when he stepped down after Stacy Peterson disappeared.
Brodsky said he had not spoken with his client Peterson as of late Thursday night, but expected to speak with him Friday.
Doman told ABC News she hated watching Drew Peterson walking around freely and seemingly basking in the media limelight in the year and a half since Stacy Peterson vanished, an event that inflamed her own family's suspicions about Peterson regarding her sister's death.