The former Bolingbrook police sergeant suspected in the disappearance of his fourth wife is taking his fight to regain control of his third wife's estate to the Illinois Supreme Court.

The appeal filed Wednesday follows last month's appellate court ruling, which upheld a lower court's decision to take control of the estate of Kathleen Savio away from Drew Peterson and give it to Savio's father and sister.

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Peterson has denied any wrongdoing in the disappearance of Stacy Peterson, and he hasn't been named a suspect in Savio's 2004 death.

But after Stacy Peterson's 2007 disappearance, Savio's body was exhumed and her death was reclassified from accidental to a homicide.

Peterson's lawyer, Joel Brodsky, says he thinks the court will agree that the appellate court made errors in reaching its decision.