Thanks to those who explained their reasoning. I'm still unsure how knowing the names of people I don't know will make a difference to me, or why I 'deserve' to know the names. As the murderers themselves will be in jail for a very long time, all I can think naming them will do is increase the burden on their parents and siblings, who (AFAIK) have done nothing to deserve it.
Justice being seen to be done makes sense, but again, we know that the murderers have been found, tried and convicted, which is the important thing.
As I say, I'm not making a case for withholding their names - I'm not bothered either way, really. I just don't understand the clamour to hear them.