This is interesting, but oddly, I have heard others who suspect the opposite (that AK was involved, but not RS, and that RS attempted to cover for AK). Of course RS told the police he could not really vouch for where AK was while he slept, and she could say the same of him. In the Lifetime movie, he tells police she left his house to go to Le Chic, but I never read any reports of this, and wonder why they even put that in the film, which was supposedly "fact driven".Just a thought - AK might have staged the crime scene if she believed that RS was involved.... While I have felt AK was never involved, I'm just a bit less sure of RS...
I cannot remember all the facts to know if there was a time when AK and RS were not together on the night of the murder, thus leading AK to think RS might have been involved...