In October 2007, Drew Peterson's fourth wife, Stacy Peterson, mysteriously disappeared.
Shortly after her disappearance, the authorities decided to revisit the death of Peterson's third ex-wife, Kathleen Savio, who was found dead in the empty bathtub of her home, according to a local news station. At the time of Savio's death, she and Peterson were divorced but still working out a property dispute. Her death was initially ruled an accident and no charges were filed.
However, when the police were informed that another of Peterson's spouses had disappeared, an extensive investigation into Savio's death was conducted. The former officer was then charged and convicted of killing Savio. At the time of Drew Peterson's conviction, Stacy Peterson's body had not been found and he remained a suspect in her disappearance. Peterson's body has not been located to this day.
Drew Peterson was later convicted of arranging a hit murder on Will County State's Attorney James Glasgow, a prosecutor in his case. Peterson is serving 38 years in prison for the murder of Savio, plus 40 years in prison for his murder-for-hire conviction.