If I was a parent of one of those children, finding out that the person who did it was known to authorities would be very hard to take. Losing a child is bad enough but knowing that something could and should have been done to prevent it would tip me over the edge.

Obviously you would never get over it but knowing there was nothing that could have been done to prevent it would be much easier. The government who did nothing prolong the agony for the family. It's sickening to be honest.