Misunderstanding [Derek and Angel] (2)

"You're back early, thought you were supposed to be with Angel," Jake said as he saw Derek stomping into the room, his shoes were dusty and his head lowered, without a word, Derek walked past him making Jake frown. He could feel the sharp aura that flooded the room, the sparking sound told him something was wrong but since Derek wasn't in the mood to talk he would wait.

Though he knew that aura, for Derek to be like that someone must have crossed his threshold, did this mean Derek had killed someone, if he did then why was he like that? Jake had no idea that Derek would have made enemies with the military had he killed James. The Sky Palace was still raging as if it weren't for their rules, this would have been all over the net.