One question that bugs me.why was one of the victims donations page was set up 4 days before the
shooting?
There were a lot of strange things on the day of the shooting. I was at work and trying to keep an eye on it as details came in. When at first they reported that kids had been shot, all sorts of random stuff was posted and broadcast, from another shooter in the woods to two guys going outside the building etc. Then they didn’t ID the shooter properly, accusing his brother, and saying that the Dad had been shot. There were reports of a van or a car with the back window blown out, and all sorts of weird police radio comments. What was strangest to me was that while the bodies were still warm and unseen, the gun control witch hunt had begun. I remember the police spokesman saying in his most outraged voice that every one of these GUNS will be investigated back to the workbench they were made on and who made each part. No mention of the shooter. Only the guns.
Here's an example of webpages about Hurricane Sandy seeming to be dated weeks before that event happened: