i think it may be someone who is pretty familiar to us. But anyway he/she is hiding behind the smoke. As Bruno Heller said RJ might be seen by us already. But there are some mysteries we have to have a look. Remember the 1st season finale, When cho and rigsby went to find the person who bought toy for Rosalind Harker to a toy shop, they suddenly came across the owner of the shop. The owner said that he was having security camera footage and willing to show them.Then the three persons got into the shop.But at that moment someone is crossing them by having a deep look combined with a mysterious smile.... who is that? Red John?????