I think all we know is that the search is failing to produce results. I also tried "collateralmurder" and "collateralmurder.com" and both fail to give any web

I think all we know is that the search is failing to produce results. I also tried "collateralmurder" and "collateralmurder.com" and both fail to give any web results and indicate no warning banner. Both results do link to MSNBC's own stories which cite the links. You may very well be correct that the cause of the result was deliberate blocking. I was simply trying to suggest that their might be some automated error prevention heuristic at work that was potentially a cause of the same effect.