I agree with "What we should do is make changes to our laws so that this can never happen again" and we can do both at the same time. We need to strike while the iron is hot (see Revelations 2:24-29).
You need to move on and do something positive about this - such as making sure who ever is a representative of you, makes it a priority that the disabled are protected and when there is doubt we err on the side of life.
It's actually people like you that I find scary - advocating anarchy. Perhaps a good nights sleep will make a difference for you and you will think rationally.
Good night.