The porshe comment was made before anyone knew the situation was so serious inside WHF. Jeremy was making small talk with the police, remember it was several hours waiting around until the police got their act together and entered the farm. He didn't have much in common with them so talking about cars would be some common ground. Personally I have a big problem with Mugford's behaviour after being told that 5 people were about to be murdered that she did nothing.
That doesn't wash at all. Jeremy knew the minute he arrived at the farm that there was a big problem. In fact, if his conviction is safe he knew quite a bit earlier what was going on.
The talk about his new Porsche was totally inappropriate but hey, what can you expect from a sick mind who that to his own family including two lovely children?
I doubt that someone who'd just murdered his entire family would be talking about new cars anyway. I get the impression that PC Myall was trying to take Jeremy's mind of the situation and it was he who initiated the chit chat.
Exactly Kaldin, and he was talking about a 'replica' kit car, not the real thing.
Oh that makes it ok then?
I think so, yes. I've no idea what the price of a Porsche is, in 1985 or now (I could google it but can't be bothered to right now), but a kit car is, surely, thousands of £s less!
The point is that the officer was engaging him in conversation and this remark about JB made about wanting to get this replica car has been translated into him planning on splashing out on the real thing just to reinforce the idea that he was greedy.