I had a thought which is probably not important even if it does end up being right. I never looked very closely at the chair, and I dislike guns enough that I'm not real familiar with what the damage one did would look like (I can't stand loud noises), so I may be way off base again. I was just thinking about Molly and wondered if she may have been barking at the guy from under the chair and he shot at her, hitting the chair instead. I hate to make it sound like she's to blame for anything, but is it possible that Jayme had managed to stay out of sight, got her mother's phone and hid (maybe in her parents' closet after getting the phone), but Molly came looking for her when the guy went after her. Some of the disturbance they heard could have been the guy yelling at Molly (maybe not by name if he didn't know them) and banging things around. She may have tried to stay quiet to keep him from knowing she was there, but Molly might whimper because she's afraid; once he opened the closet door all the way, he could have see her, pull her out and drag her out of the closet and the room. She would probably start yelling for help knowing the phone was still connected to 911, but Molly could have accidentally cut off the call while trying to hide better ... sorry Molly for making you the fall guy.
Unfortunately that doesn't get us any closer to knowing who did it or why, or where he took her even if it did happen that way. I just thought if I document what I'm thinking, it might help my mind get more organized so I can possibly come up with something useful. MOO