According to Lomax's book,Sheila had " gone crazy " many times over the years before the tragedies happened,and with the help of Social Services and of course the immediate family,issues had been resolved without the need for police intervention. This is why Jeremy was always on hand to help with Sheilas' difficulties. Sadly,this is seen as a further excuse to use towards his sister,as it can,and has been twisted to say that Jeremy USED this information to safe-guard himself.
Even the fact about his non 999 phonecall,which I understand about,but nobody else can,as again he's blamed for making excuses.
The " slow driving" also came in for much criticism too,and this was only the beginning of a ghastly nit-picking case. If he'd have sped to WHF,there'd have been suspicion that he'd have " been helping police with their inquiries ",the same pattern as Huntley,who" couldn't do enough for the police ".Now that's suspicious !!