You believe no sound moderator was used therefore you accept a conspiracy has taken place to manufacture evidence. If you don't believe in a conspiracy then you haven't thought your position through.
Manipulating JM and SB is the easiest part.
I know exactly what I think and who I think was responsible. I wouldn't share that with you though, you would be the last person! They had/have enough without the silencer to show Jeremy is guilty - it was insurance. Whether you agree with it or not - a man who kills 5 people including two small boys deserves a whole life tariff.
I didn't just mention JM and SB - you know that though!
Oh by the way, I have done a list of circumstantial evidence with just a little more to do - however, I will post it AFTER you show us the evidence that points to Sheila.