Before we start @rubbishatballet I want to stress that what systemic improvements could be made isn't the same point as whether there are problems to begin with. Just so we all remain clear about the known, factual, not a matter of opinion issues with this specific case. There's nothing wrong with concluding that this is the least worst option available, provided one doesn't in doing so minimise the issues.
Okay, so how do you deal with the inevitable deadlock and delays that would cause? Would the court have to force one side or another to capitulate after a certain amount of time and/or vetoes? I don’t often find myself standing up for Letby, but I really can’t see how a system like that would have served her fairly for eg the insulin babies.
You've not shown us how this would differ from the inevitable deadlock and delays in the system we already have. I know your legal experience goes back a bit, so you perhaps haven't seen what the court system has looked like over the last few years.
So you can’t see anything wrong with defendants having to agree to a joint expert, even if that expert is only going to be able to support the prosecution case and undermine the defence case? As per my response above, how would that have played out any better for Letby for the insulin babies? It would have been two whole life orders guaranteed before they’d even got started.
Of course there are potential problems in any system, although obviously if the Letby trial had been conducted under an agreed expert panel system the process would've looked so different that your two life orders claim is a wild guess. How on earth do you know who the agreed experts would have been in a system where roles like those Dewi Evans saw himself filling don't exist? You don't. @Oftenaddled has addressed the rest before me just now.
Do you think we should just remove any consideration of human behaviour from criminal trials then? Even though all crimes are fundamentally, and only, a result of human behaviour. What sort of expert would even be able to provide objective evidence on motive or intent?
It would be better if we were to avoid reliance on the sort of speculation the prosecution engaged in during the closing argument, yes (again not a criticism of any member of the team, they all did their duty in the system we have). If there isn't any expert evidence that would be applicable to a particular behaviour or motive, the jury can be told that.
So the prosecution should not have been allowed to demonstrate that Letby had the opportunity to commit the crimes she was accused of? Hardly any time was actually spent on the rota chart during the 10 month trial, and as the jury didn’t convict her on all counts perhaps they didn’t find it as persuasive as some statisticians would like to think they did.
Your 'perhaps' means nothing. None of us know how persuasive they found the poor statistical claims put forward by the prosecution on the cases for which they did convict, although it's instructive how often the people who believe she's guilty want to make assumptions about the jury's views here.
The prosecution were entitled to do as they did within the system we have, so its not a criticism of any individual, but we need structural change so this doesn't keep happening. I mentioned earlier the possibility of RSS produced guidance and an application being needed to depart from this, if we weren't using agreed expert models.
On the narrowness of test point, evidently you hadn't bothered searching for the document- @Oftenaddledhas linked.