I do think the un sent text is crucial to the time line though. 11pm.....her phone was off....imo, that means Allison did not have control of it, either she was deceased by then, held captive, or fighting. So the minimum time the killer was at her house was 2 hours. And I don't know if that's Minnesota time or Az time either..
One other thought, if she was friendly with him ( knew him, wasn't thinking he was going to hurt her, and let him in, etc), she may have told him innocently that her bf wasn't coming back. Or, since the killer had her phone, he may have read messages ( if any) on her phone where Allison and her bf exchanged .."goodnights, see you tommorrow ", etc. Just a thought
It's food for thought, but playing devil's advocate here, I believe the only way anyone would know her phone was turned off at 11pm was if her cell phone records showed that her phone wasn't "pinging" off any cell phone towers in the area. Her father would not have been able to know that her phone was
turned off via sending her a text message that wasn't delivered. He would have known it wasn't
delivered because he most likely would have received a notification on his own phone, but I don't believe there was a way for him to have known at that point that her phone was turned off.
Also, let's think about why the killer would take the time to go through her text messages.
If the motive was originally robbery, he most likely would have incapacitated her and bolted with whatever he managed to steal. Time is of the essence in a robbery situation, even more so if the crime unintentionally escalates from robbery to murder.
If her murder was pre-meditated, I would imagine the killer would have known prior to harming her if there was any chance he would be interrupted/surprised by a third party. Unless Allison was very familiar with the person who killed her, I cannot imagine that she, as a single woman, would volunteer the information that she was home by herself at night and no one was due to visit anytime soon. Now, if she arranged to meet someone at her house after her boyfriend left, that could be how the killer knew he'd have plenty of time to commit his crime without getting caught. Maybe she "kicked her boyfriend out to go home and study," so that she could meet someone else. Maybe she wasn't as happily involved in a serious relationship as her friends/family thought.
(Speculation only, of course.)
If her murder
wasn't pre-meditated (ie, a rage killing), I would be very surprised if someone took the time to figure out how much time he had to kill her and if he needed to leave right away. She used her phone for business ("her phone was her life"), so I cannot see her letting some random person she didn't know very well casually pick up her phone and start going through it. And I cannot see someone who just "accidentally" murdered/seriously harmed another person having the presence of mind to find her phone and scroll through text messages to see if he could hang out for awhile after the deed was done.
Now, pre-meditated or not, close friend or casual acquaintance, I COULD see someone scrolling through her text messages to see if she'd told anyone he was coming over or something along those lines. IMO, that would require more logical thinking vs. being in a panic that he'd just murdered someone. His action of splashing her body with a bleach-like substance to try to erase DNA/evidence also seems to me like more logical thinking, particularly if he had to go search for it under a sink or in the garage/laundry room after he killed her. His stealing her phone, her credit cards and her bracelet also seems like more logical thinking, to make it appear more like a robbery-gone-wrong.
I'm probably wrong on all counts, but lesajo brought up an interesting possible scenario that I clearly overanalyzed! :blushing: