Sounds like the injured officers are suing. It’s a civil case not criminal, so I’m not sure how much the court would actually be asked to legislate. I’d be interested to hear their arguments, though I’m sure part of their reasoning for suing Tesla over the driver is they have more money.
Unless I’m missing something this seems trivial to test. Just test blood sugar before and after drinking a diet soda. If bloods sugar goes down then the sweetener likely caused a release of insulin. If it doesn’t change then it didn’t.
It seems petty far-fetched. If artificial sweeteners caused a runaway insulin spike then I would expect them to cause a lot of cases of diabetic shock.