You're more gracious than I am, 1&2&3, because I think she knew every dirty, disgusting detail before, during AND after.
MOO, MOO, MOO
I agree with you to an extent, although we’re still guessing right now.
Her minimum involvement, could be something like this:
He solicits her multiple times, to which she says no.
She fails to report these solicitations, which isn’t criminal, but is immoral in every way (this is why I have said repeatedly that she is a terrible person).
Ultimately, PF decides to do this on his own.
Following Kelsey’s murder, he disposes of the body, and cleans the crime scene.
He calls KK, and tells her that he needs to see her right away (it’s also possible that she was already planning to visit him over Thanksgiving).
She arrives, and he explains what he wants her to do regarding the cell phone. He also tells her what happened.
She does exactly as instructed.
KK keeps her mouth shut, until contacted by law enforcement. She knows that she is in big trouble, and decides to play ball.
A deal is struck in which she will reveal what she knows, and testify to it in court.
She tells law enforcement what she knows regarding the crime, and directs them to evidence. Something like “he told me he beat her to death in her house.”
This would account for the final search of Kelsey’s home in which evidence was recovered, and the statement that law enforcement believes that she is dead.
Law enforcement investigates KK’s account, and finds it to be truthful.
Deal on.
I’m not saying that I necessarily believe this, but I am open to the possibility of a similar scenario.