To my mind, she knew her victim.
The death scene alone, went according to her perception as to how she would die. And she did!
Only those of whom she confided in would know it!!
Not a passer-by, not a mailbox raider, or destoyer!
She was expecting someone and opened that garage door, which was always locked. Only Audrey had the the ability to open it up on the inside.
If there was a key pad on the outside, and we don't know about that, then someone must have known the code.
That is my opinion.
snipped by me: Chorley's posts have made me go back again! I have re-read-and put together in sequence all of PK's posts.
In his one post he says that he HAD the code for the garage door and AG told him, he was NOT to share it and that he was the ONLY one to know the code. (or so he believed)