That is one of my biggest wishes. And my theory is that he really wasn't killed and it was just done so he could go undercover (like Raymond). Of course, I'm in denial. I think since Horatio gave him the gun cleaning kit in Dispo Day, that he has been keeping his gun clean. His "dirty gun" reputation made for an easy out. We never saw where Alexx did an autopsy. She started to cut and then quit. Didn't Horatio walk away right before she started to cut? They never showed his body later where she had cut into it. I'm convinced that she's the only one of the team that knows he's alive. Now, how would he reappear? Would he just show up at the lab? Would Alexx bring him to the lab and then let the rest of the team know? Would one of the team see him somewhere (think it was him but no it wasn't)?