It’s being described as “one step towards justice.”

Won't they have to show there was some intent to sicken/kill the citizenry?

They knowingly falsified records to cover the fact that the water was not safe.  Thats a crime everywhere!  They may not go to prison, but I am sure they will be fould guilty of a felony.

for those 3. Also they said there are more arrests to come

I do not know about that, this has got so much press and is so egregious, no matter who is elected it will need to go forward.