Assalaamu alaikum Abo Mussaab,
I agree with Search. If we want to put a wrong right, of course we need to discuss it sometimes. But it seems to me that this is just sensationalism. The man (Steven Green) was already widely recognized as having done a truly wicked act, and was jailed in the US for this crime in 2009. Furthermore, he committed suicide in 2014. Finally, before he died, he acknowledged that what he did was very wrong and apologized to the relatives. Why are you bringing this up now? What good comes of this?
May Allah, the Good, Help us to do what is Pleasing to Him.