JOLIET, Ill. (STNG) - The daughter of Drew Peterson's second wife and the sister of his third wife appeared Thursday before the grand jury investigating the third wife's death and his fourth wife's disappearance.

Sue Doman, the sister of dead third wife Kathleen Savio, said Savio's former boyfriend, Steve Maniaci, testified before her Thursday. Maniaci spoke to Savio on the phone two nights before she was found drowned in her dry bathtub in March 2004.

State police initially found no indication of foul play in connection with Savio's death. Their opinion was contradicted in November after a forensic pathologist performed additional tests on her remains and concluded she was the victim of a homicide.

Peterson's attorney, Joel Brodsky, claims Maniaci and Savio broke off their relationship the weekend before she was found dead.

"If he was smart, he took the Fifth," Brodsky said of Maniaci. "If it was my girlfriend who was found dead, and it was declared a homicide, and I had the code to the alarm system, and there were no signs of forced entry, I would have a lawyer with me."

Maniaci could not be reached for comment. Savio's niece, Melissa Doman, disputed Brodsky's assertion.

"No. If memory serves me correctly, he was at my aunt's wake," Melissa Doman said. "Why would he be there if they broke up?"

State police have not named suspects in the Savio homicide. They have conceded Peterson is under suspicion for disappearance of his fourth wife, Stacy Peterson, a matter they have classified a "potential homicide."

Brodsky said that instead of focusing on Peterson for Stacy's disappearance case, police should be turning an eye to others.

"They're got tunnel vision," Brodsky said. "I'm not just whistling Dixie."

Peterson's second wife, Vicki Connolly, is alive and well in the tiny town of Paxton. Her daughter, Lisa Ward, appeared before the grand jury but declined to discuss her testimony. Sue Doman said she was advised by an attorney not to comment on her grand jury appearance but did share her feelings on the case.

"We miss my sister very much and this is just a horrible situation and we just want justice to be done," she said.

"We're just not letting this go," Doman said. "We miss her so much and our family just hasn't been the same."