I think naming him will possibly harm his mother, who actually inadvertently reported him in the first place.
On the other hand, the benefit of naming him will be useful to find out his childhood history to see if there were any warning signs or red flags.
It sounds as if it's been a particularly brutal murder, what made him do such a horrendous thing?
Understanding why may help prevent something similar happening in the future. I hate to say it, but see cannabis use and porn featuring in what I'm reading already. In a young developing mind that's never good.