No, I don't think she was necessarily on her side. Dee Dee said that she could have been lying on her back, and her muscles simply contracted her arms into that "boxer" position. When she was laid down on the floor upstairs, they could have put her on her side at that point, even though she had been on her back in the cellar. She just didn't have a front-on photo taken. Or if she did, we never saw it.