It wasn't generally dangerous, but we've starting refining AI enough that if you pile enough in one model you get an emergent fissile reaction out of it and it starts to become a really big danger.
The hard part is to figure out where the danger is and where to cut it off. The information freedom people are never going to agree that information could be dangerous for example and will fight you all the way down.
At the same time people are going to get real fucking tired of clumps of information hacking their bank accounts and stealing their money and want to do something about it.
i) it would not be weird to be tried for manslaughter;
ii) it would not be weird to be found innocent/for the case to be dismissed.
Generally people prefer not to experience (i) even if they can expect (ii).
What's the point of prosecution in this case, assuming the circumstances were known in advance? Is it just "police/prosecutors are pigs and are out to oppress people at every opportunity"?