Hey everyone, thanks for replying my questions! I'm a newbie so bear with me if this was discussed before and please moderators feel free to delete or modify my post if it goes against any rule of this forum.
I found one cached thread at
http://chanarchive.org/4chan/b/47050
and it seems that Luka posted there himself with the nickname "blUNJBxK" talking about the murder. He says it was a cat (not a dog) in the 1 lunatic 1 icepick video and wrote a lot of graphic details about how it happened, information that I don't remember being released by the press at that time. I don't think it's some random troll who wrote those things. If that was indeed Luka who posted, it explains why he did and how.
Any thoughts? sorry, if this was discussed before, thanks in advance!