(EDIT: though I'm still struggling to see the point of the parent comment, the above was in response to a slightly different phrasing that might've gotten the worst of me. At any rate, I don't wish to persue this dicussion any further.)
His anonymity is meaningless. Actions are performed by people; there is no way to hide effectively forever.
He is trying to not be caught when committing crimes. So, my comment was to help publicize the information the criminal doesn't want to be found.
But don't read it like me pointing at you and saying "in Brazil you'd get your arse fined for that!" Read it as: I was taught to believe that what you just did is very serious and so I'm trying to see the relevance of your comment.
If you think you have hard evidence that you know who commited a fellony, go tip the police. I wouldn't in good faith want to attach that much stigma to someone's name in a public forum when there's a risk, a real chance I might be wrong.
If that is his correct details - fine, but if not you are messing with someone's life and I don't really understand why you are doing that? If you went out and tracked this guy down, fair enough, but you are just repeating gossip.
Can you let me know what you planned to achieve with this?