Even if she was meditating on the things contained in the Psalms it's a huge stretch to claim she is therefore the perpetrator of the tragedies.
The only conclusion that I draw from the significance of those Psalms is this :
Whoever was responsible for the Bible being open at that page had a high level of religious understanding - it was 100% relevant to what had took place - way beyond coincidence ...
It could have been Sheila or Jeremy or Malcolm or maybe someone else - but whoever it was had a total understanding of those Psalms significance - something that most people do not posses ...
It is a rare person who would understand the significance ....
So for me it is a possible clue as to the guilty parties identity ...
When I am asking myself if a particular person is guilty one relevant factor therefore is "do they have an expert knowledge of religion ?"
If they do then to me it would make them a more likely suspect - if they do not then I would rule them out for that reason alone - it's that significant ....
For example if I was investigating whether or not Malcolm was involved then his knowledge of religion would be very significant - same goes for Anthony Parteger, Robert Boutflour, Jeremy and Sheila and any other suspect that I put thought to ...
If it was in fact Sheila that was reading those Psalms that night then to me she would be 100% responsible for that reason alone ...
If it was someone else then they wrongly assumed that whoever found the Bible would pick up on the significance thereby making it look like Sheila committed suicide ...
It either was Sheila or was meant to look like Sheila was reading that particular page ...
If it was not Sheila then it was not just the Bible being next to her that was meant to suggest it was her - it was the exact page as well ...
As it turned out no one picked up on the significance of that particular page ...
Kaldin might be right in feeling that the Bible might have an extra interesting story to tell us ...
Consider this :
If it was Sheila then did the Bible get blood stained etc on that page naturally ?
Or does the way it was found and the blood stains look more like a "set up" on careful examination of the facts ?