It was said that she was slumped with her mouth ajar at 7:50am, and limp at 9:40am. While I have no experience with dead bodies, thank goodness, I wouldn't think an ajar mouth would indicate rigor. That seems like a totally relaxed position to me.
Pg 35:
The female appeared to be completely slumped over and with her mouth ajar.
Pg 31:
I observed a male at 0750 hours with a female wearing a green sweater in the front seat. This person appeared to be sitting upright with her head slumped over to her left side.
Pg 36: approximately 0940 hours <snip> The male then walked to the front passenger side of the vehicle, opened the door, and proceeded to carry
what appeared to be a limp body to the trunk of the vehicle
What I found about rigor might help determine the time of death.
While rigor mortis develops simultaneously in all muscle tissue in the body, voluntary and involuntary, the size of the muscle determines the perceptibility of changes by the examiner. Smaller muscles over the face – around the eyes, around the mouth, etc. are the muscles where rigor mortis first appears, followed by rigor mortis of the muscles in the hands and upper limbs, and finally appears in the large muscles of the lower limbs. Rigor mortis appears approximately 2 hours after death in the muscles of the face, progresses to the limbs over the next few hours, completing between 6 to 8 hours after death.[10] Rigor mortis then stays for another 12 hours (till 24 hours after death) and then disappears.[11]
In the last phase of rigor mortis, the actin-myosin complex that has formed starts disintegrating due to proteolysis, resulting in the dissolution of the stiffness. This process begins in all the cells at the same time. However, just like with the appearance, this change is perceptible first in the smaller muscles of the face, followed by muscles of the upper limbs, and finally, the large muscles in the lower limbs. Rigor mortis generally disappears 36 hours after death, followed by a phase known as secondary flaccidity.
Forensic pathologists are essentially required to estimate the time since death (TSD) to assist in death investigation by limiting the investigation period and thus helping narrow down the number of suspects in homicide cases. TSD also provides valuable information in establishing the timeline...
www.ncbi.nlm.nih.gov
With all that said about the timing of rigor, and where it starts (smaller muscles of the face), and progresses to the limbs over the next few hours (so we're approximately at hour 4 now)... If her mouth was ajar at 7:50, I don't think it had set in yet, and her body limp at 9:40 (ditto)... Would one surmise she was killed shortly before SS threw her belongings into the garbage at 7:35? Or can someone come up with how it could have been done before midnight and when SS was on Telegram (I think it was 11:49am or so), which I felt is when she was killed... yet I can't make that time work if I include the stages of rigor in my theory.
So, if she was killed at 11:30 Sunday night, and SS was throwing her things away ~8 hrs later, she's be fully stiff, not limp, nor with an ajar mouth, as rigor completes
between 6 to 8 hours after death and starts with the face/mouth. At least I think that's how it would be.
All MOO