A grand jury investigating the death of the third wife of former police sergeant Drew Peterson wants to review a hand-written will drawn up nearly 10 years ago, according to a report.

Peterson, a suspect in his fourth wife's disappearance, signed the will with his then-wife Kathleen Savio to leave all possessions to each other in the event of their deaths.

"There was really nothing sinister about it," Peterson said. "It was just simply in case something happened to us while we were on vacation."

Stacy Peterson, 23, was reported missing on Oct. 29 after she failed to show up at a friend's house.

Savio, who signed her name at the bottom of the two-page will dated March 1997, was found dead in a waterless bathtub in 2004. At the time, Savio's death was ruled accidental. Savio's body was exhumed amid suspicion about her death and an independent medical examiner who conducted a second autopsy told FOX News that it was a homicide.

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Savio's family said their loved one told them she would never live to see the end of the divorce.

Karen Conti, a Chicago attorney, reviewed the documents of Savio's estate. Conti said she believes the will was beneficial to Peterson.

Savio agreed to the terms of the will by not taking the simple act to revoke it, said Joel Brodsky, Peterson's attorney.

"Since she didn't do it, I have to assume that this what she wanted to happen," Brodsky said.

Peterson received jewelry, furniture and $288,000 from the sale of Savio's home.