Whilst it remains true that Adam has zero biblical knowledge, I DO have some knowledge. You say that the page on which it was open makes it clear to anyone who has a GOOD knowledge of the bible. GOOD is the key word, don't you think. I was able to type in "Bible verses relating to forgiveness" -something which wouldn't have been available then- the psalm, thus the page on which the bible was opened was not given in any of the copious lists given although I appreciate I didn't view them all. I can only suggest that June -whose knowledge of the bible was far greater than my own- was reading this particular psalm, perhaps it was a favourite, and Jeremy picked up the already opened bible and placed it, as he believed, appropriately. The point I'm trying to make is that if I, who was bought up with regular church and Sunday School attendances and reasonable working knowledge of the bible, now having the availability of search engines at my disposal, was unable to pull out a relevant verse off the top of my head, I'm perfectly certain that Jeremy didn't.
It is possible June was reading the Bible and had it open at this page - i am sure she had read every page of the Bible many times ...
But as you can see from my reply to Adam above it is for sure very relevant to seeking forgiveness after having committed murder - which is why i rule this particular possibility out - this edition of the Bible has roughly 1,344 pages and even accounting for the fact it was open at a double page still leaves only a 1 in 672 chance of it being open at this page by random coincidence ...
And that is too unlikely for even Sherlock to consider possible ...
And of course from our limited knowledge of Jeremy it would appear unlikely that he would have had the required knowledge - but as Adam said he had plenty of time (if guilty) to prepare and research - so it is a possibility ...
Another possibility is that if a hitman was involved then the hitman would have had this knowledge - from Sheilas account of Jeremy's confession to her he allegedly stated that the hitman had planted the Bible to make it look like Sheila did it - although the alleged confession made no mention of the relevance of the particular page it was left open at ...
The only certain fact (barring a 1 in 672 coincidence) is that whoever committed (or ordered) the murders had the required knowledge of the relevance of this page (Psalm 51) ...