Not saying this is the case at all, but ages ago I said there may be damage to her hands caused by attempts to hold onto her car-keys, phone, purse
Most often, a woman attempting to escape will cling to her car keys for dear life. And just as desperate are the often brutal attempts (often successful) to tear them away from her
There are women all over this nation with distorted thumbs in particular from looping a car-key ring over their thumb (then closing the hand over it) to prevent their keys being ripped from them
If it's true Allison was missing a hand when discovered, investigators will know, hopefully, approx. when it was removed. It may be that the killer/s realised the story a damaged hand would tell and went back later to remove that evidence. Because a hand damaged in a certain way (say from trying to hold onto a bunch of keys) would demolish claims she left for a walk
Just speculation ...
MOO :moo: