I have to say I don’t think the foster dad did it. I find it hard to believe he wouldn’t have been covered in blood, at least hands or wrists. I think the timeline was about 3-4 minutes that he was in the house while his other daughters were waiting in the car.
So he was supposed to have violently murdered a young girl who he’d parented for 4 years, then within a minute or two, walked back to the car with no visible blood on him and behaved perfectly normally with his daughters knowing he’d killed their foster sister 
.
It was also said the amount of blood spots on him added together equalled less than a pin prick and it was possible they were exhaled. Also in an attack like that, it would have been expected that Jenkins would have blood on his back but there was none. He must have used gloves to pick up the tent peg, which again would have indicated premeditation, as his prints weren’t on it. Where were they if he only took a few minutes to leave the murder scene,
Why was the bit of plastic the neighbour took from Billie-Jo’s nose not analysed? There was no mention that it had been.
Also the tent peg was said to have been at the back of the garden outside the shed that had been cleared out that morning so he’d have had made the effort to premeditatedly go there to get it, as opposed to flying into a frenzied rage and attacking her in the heat of the moment as the police alleged. He could have used his fists or something nearby. It ties in with intruders coming in from the back of the garden which was something the family had previously been concerned about.
People behave oddly when in shock.
He may well have been an abuser but I wouldn’t believe what his wife said just because she was a social worker. I’ve worked with a lot of them professionally! Why as a social worker was she allowing her children and a vulnerable foster child(!) to be in abusive household if that was the case? She would know very well the safeguarding procedures and had access to advice and support. Why did the neighbour not report the alleged ‘kicking the daylights’ out of her before knowing full well she was a foster child? All seems very convenient. I imagine if the police were insistent that my husband had murdered a child in my care, I’d be tormented by guilt and try to make sure he was convicted too.
More people lie on their CVs than you’d imagine. Or at least they used to when you could get away with it. The police tried to use that Jenkins was stressed that his lies on his CV were about to be exposed as an explanation for him losing his temper but he’d already accepted the promotion to Headmaster due to the current Head’s retirement so that wasn’t an issue and the lies were only discovered after his arrest. There were no allegations from anyone at the school reported.
A mysterious man with a scar was identified as a suspect in a previous attack on a young girl in the area. That witnesses placed him in a different area at the time of Billie~Jo’s murder shouldn’t have ruled him out. It would only take one timing being out or one person misidentifying him. There was no CCTV to be sure.
That a man who fitted the description of a suspect in a previous attack was roaming the area acting suspiciously and was being searched for as he had such severe mental issues that he needed sectioning, as well as being known to have had bits of plastic like that found in Billie-Jo’s nose which is rather an unusual coincidence, is too big of a coincidence IMO.
Could have been that the police knew they wouldn’t get anything out of the mentally disturbed man, it was late for forensic evidence but they needed a conviction for such a horrendous crime, Also there could have been questions about why he wasn’t picked up before for the previous attack that he fitted the description of.
I’m no supporter of Sion Jenkins but this stinks.
I do wonder if the police ever looked at Michael Stone for this after he was arrested for the Russell murders.