Also on Wednesday, Peterson's appearance on a network TV morning show to discuss the disappearance of his wife, Stacy, and the mysterious death of his ex-wife fueled more turmoil in his Bolingbrook neighborhood.
Morelli declined to comment on whether he testified. Later, he could not be reached for comment on whether it was he who signed the will.
Savio, 40, was found dead just weeks before the divorce settlement between her and Peterson was to be made final. An autopsy noted blood covered her hair and the back of her head had a 1-inch gash, but the cause of death was determined to be drowning. In May 2004, a coroner's jury ruled it accidental.
But the Oct. 28 disappearance of Stacy Peterson, 23, raised new questions about Savio's death. Last week, State's Atty. James Glasgow announced a formal reinvestigation of Savio's death, and State Police Capt. Carl Dobrich called the sergeant a suspect in Stacy Peterson's case, which he described as a potential homicide.
On Tuesday, Savio's body was exhumed and investigators served a grand jury subpoena to Peterson's brother. Peterson, meanwhile, flew to New York. He appeared Wednesday on the "Today" show, where he told host Matt Lauer he had nothing to do with Savio's death or Stacy Peterson's disappearance.
"I can look right in your eye and say I had nothing to do with either of those incidences," he said. Peterson said his relationship with his wife was contentious, and said her mental health deteriorated.
Peterson, who contends Stacy ran off with another man, said he did not know why she hadn't contacted anyone. Asked what he would say to her, Peterson responded, "Come home, tell people where you are."
A source familiar with the investigations said Drew Peterson appeared last week before the grand jury but would not say which case it was investigating.