I’ve been thinking about this more and more so will post it here….
A few things worth noting:
1) Faith’s body was discovered around 11am, with police there soon after.
2) We know Faith and Karena arrived home from the Thrill shortly before 3am. and Karena then left again around 4:30 — IF Karena killed Faith (which I DON’T believe, but some do) she had a narrow window of opportunity to do it, basically an hour, say between 3:15 and 4:15am., 7-8 hrs. before Faith's body was found.
3) I (and I think many others) have always presumed the crime occurred after Karena departed, but still under the cover of darkness before sunrise, say between 4:45 and 6:45am, a 2-hr. window, 4-6 hrs. before discovery.
4) We have never been told an estimated-time-of-death for Faith, either from the police nor the Coroner.
The table below, I found on the Web, summarizes bodily changes that take place within 48 hours of death:
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Time since death: …. Change observed
1-2 hours: ………Early signs of lividity. [blue-gray discoloring]
2-5 hours: ………Clear signs of lividity throughout body.
5-7 hours: ………Rigor mortis begins in face.
8-12 hours: ….….Rigor mortis established throughout the body, extending to arms and legs
12 hours: ……….Body has cooled to about 25°C internally.
20-24 hours: …...Body has cooled to surrounding temperature.
24 hours: ……….Rigor mortis begins to disappear from the body in roughly the same order as it appeared.
36 hours: ……….Rigor mortis has completely disappeared.
48 hours: ……….Body discoloration shows that decomposition is beginning.
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Thus, if Karena were the killer, 7-8 hours earlier, one would expect some noticeable rigor mortis and extensive lividity.
IF the crime occurred after Karena left but before sunrise, 4-6 hrs. before the body was found, one might only expect some rigor mortis beginning in the face, if any at all.
Of course neither rigor mortis or lividity is described in Karena’s 911 call, which may be understandable under the circumstances. I’m a bit more surprised that the first officer on the scene also made no mention of rigor mortis or lividity in his brief initial report (though perhaps I’m wrong to think such an observation would be routinely recorded?).
But this all does leave yet one other possibility: that there was NO lividity or rigor mortis to note when the body was discovered! That the murder took place much closer to 11am! Perhaps this would account too for why very little suspicious was seen or heard from the apt. that morning. By say 9:30am. maybe most occupants had left for work or school and there were few renters (potential witnesses) lingering around? Perhaps the crime occurred AFTER 10 am. in the morning! Is that plausible? — I have no idea (especially since I think Faith would've left for classes well before 10?); again the police can probably either rule that possibility in or out, but haven’t allowed us to do so. Such a late time for the crime might also very much alter theories of who-done-it.
I still believe the 4:45 - 6:45 time slot is the most probable; but I'm less certain than I was previously in this confounding case.