After an intense fight with Luther, The Shooter is defeated and after some talking he reveal the location of Cain to Luther. However, The Shooter escape saying it has to be this way.
The Shooter seemingly was a former slave who lived in the old west. During his life he came across "The Hercules Method" book and manage to utilize it.
In the preset time The Shooter started killing those who kidnap and sell other as slaves. While he was in Hong Kong Luther interrupted his kill and while Luther tried to calm him down in order to talk to him and reveal the location of Cain, a misunderstanding lead to a fight.