> Personally I want to know about the murderer. I don't want this hidden from the public.

I want to understand what the murderer's motivation was, to the extent that we can. On the other hand, I'd be happy to know that without knowing their name. I don't know if that's practical, but keeping the name out of most news reporting might measurably reduce the murderer's notoriety. I don't know if that would reduce mass shootings in the future, but it seems unlikely that it would hurt.