It had to be JB of Sheila that killed the other 4 ...and Ralphs arms injuries were caused by Sheila as her nails were in the correct size range to cause the damage and Jeremy's were not.
END OF STORY.
JB is innocent..
Only people who are incredibly thick or corrupt in some manner will try denying it.. the truth is what really happened not what those involved in blackmail , threats, protection of vested interests, etc would prefer it to be.