The letters that I'd copied,because I thought,or knew they were relevant,are " creepy " in a way as they give you a feel for how the writers mind was at the time,spoken in past,present and future tense and I felt that they were a significant enough clue in what had happened that night without the need for further investigating.
They were very telling and if someone from EP had taken the trouble to decipher the letter,then there'd have been no case to answer.
I'm now thinking it was Jan who I'd pm'd about feeling uneasy about the letters. I know I'd mentioned it to someone.