It's been said that Mary was Kathleen's best friend. I'm sure the Savio family would know Kathleen's close friends. I don't think we've ever heard how the Savio family learned of Kathleen's death. But, tonight on the A&E special on Drew Peterson, they interviewed Kathleen's sister, Susan Doman. She stated she got a call from someone - then Susan said, "SHE said your sister is dead." Susan said her reaction was to say, "did he kill her?"
I wonder if the "SHE" who called Susan Doman to break the news that Kathleen is dead, was Mary? Susan's reaction, saying "did he kill her" indicates that "SHE" and Susan shared the knowledge that DP was a danger and a threat and each knew the other was aware of this.
If it was Mary who called Susan Doman to break the news of Kathleen's death, she would have told Susan and the other members of Kathleen's family exactly what had happened. The fact that the Savio family had never heard of Steve Carcerano before Stacy's disappearance would make sense only if he was not involved in finding Kathleen or was only an un-named bystander.
We know that Mary's husband was called to testify before the grand jury this past week, but we don't know if Mary has testified yet.
Imagine this scenario: It's DP, Mary, and Mary's husband who enter Kathleen's home, and while Mary and her husband are checking other areas of the house, DP is the one who finds Kathleen. Steve Carcerano is just a bystander. But, after the police are called and before they get there, DP confers with Steve and they plan to have Steve say that he's the one who found Kathleen. The police get there and interview each of them separately. Mary and her husband know who was in the house searching and to them, Steve Carcerano is not important - just another neighbor who happened to be there. What Mary reports to the Savio family is that she, her husband, and DP search the house and DP found Kathleen. She might mention that another neighbor was also there, but may not have even mentioned his name as he's not important. What was important is that Kathleen was dead and it was DP that discovered Kathleen and that's what she conveyed to the Savio family. Because the police interview each of them separately, Mary would have been unaware of the switch - that Steve would tell the police it was he who found Kathleen.
I hope the above isn't too confusing.