I have changed from initially believing 75% not guilty, 25% guilty, to 95% not guilty, 5% guilty. So I still have some doubts.
What mainly changed my stance was reading about Sheila´s illness. She was sicker than most people realize. She was violent, she thought her six year old boys were the Devil´s children and that they were capable of raping her and killing her! Her medication at the time was begging for a disaster - many, many people have killed and acted out extremely violently after having their Haloperidol dose cut down drastically or taken away alltogether, Andrea Yates being one of them.
I also think about how peaceful Sheila looked in death. Why this peaceful look on her face?
I imagine that it would have been a daunting task for someone coming from the outside to kill five people single handedly. I can only see it happening if there were two intruders at least.
It would have been easier for Sheila. She was in the house. First the twins (and why were they shot so many times? It seems "personal"), then there were only two left to kill.
If you believe Jeremy is innocent, you have to believe that Julie Mugford is a vile liar. It is hard to stomach, BUT she is in fact a proven liar - it is on paper. She also had a lot to gain by lying. There is no doubt there was a deal with the police not to prosecute her for the caravan park robbery and the check-fraud. She also had a lot to gain financially - 25.000£ for the newspaper interview upon Jeremy being found guilty. That´s a lot of money for a young girl.
Her third motive for lying is that Jeremy had dumped her (and she hadn´t said a thing about those AWFUL murders until then???!!!)
She did say, if I can´t have you, no one will.