So the world of war corrupted his mind as a child, he then had "PTSD" but tried to live a normal life, in the battlefield if someone is above you chances are its an enemy.. so waking up to someone on top of him, he thought it was an enemy and killed them without thinking, because if you think it may be too late. After killing the woman he loved he knew he couldn't live a normal life and now only seeks to go back to war. His client betrayed him and it resulted in them being outlaws.. now this is his only way. Vary sad.