Julie accusing an innocent man of murdering his family is the daftest thing anyone would ever do.
I agree, but that doesn't mean she didn't.
Also, Adam, have you considered the possibility that she accused Jeremy because she thought he was guilty? It doesn't follow that Jeremy
is guilty.
I think life experience affects how people look at something like this. I admit I have quite a lot in common with Jeremy in terms of personality, which is one reason why I harbour some doubt because I can see that there are possible innocent explanations for much of what Julie says.
For instance, if I recall correctly, I think she says Jeremy mooted at one point the idea of burning the house down with the family in it, but that could easily have been Jeremy's idea of a joke, or a flippancy, or a way of teasing Julie.
I have no problem believing that, in the generality, Jeremy didn't like his parents, but one way of expressing this dislike could have been through dry humour and ad hoc flippant eruptions. It's actually quite a common personality quirk among English men, and was especially at that time when maybe people were more relaxed in each other's private company and we didn't have the same intrusion of political correctness into society. Dark humour was a sine qua non of manhood, mainly because it made women laugh, and if you can make women laugh, you know where that leads.
Julie could have twisted all of this round into something it wasn't, or she may even have taken the view that Jeremy's 'jokes' had a serious undercurrent to them and revealed some sort of emergent criminal intent. In other words, as often happens, she put 2 and 2 together and came up with 5.