My thread post already says why Bamber chose to just burn Neville's back.
Bamber would tell the police he left the rifle out without the silencer. Because he knew he had taken it off after the massacre.
So Sheila in her crazy rage has now burnt Neville's back. After Neville.phoned Bamber. Was that after or before she had a shower, got changed, got the bible, read the bible, wrote a suicide note and killed everyone else,
How did Sheila's blood get into the silencer ?