User blog comment:Selim 009/Seven Dragons Vs. Seven Dragon Slayers/@comment-211.31.36.180-20130430100018/@comment-7418318-20130430135846

Remember the situation.

if you had the choice to either release a single criminal or let your whole country die and the world along with it, wouldn't you take the chance with the single criminal?

Furthermore he was converted to the good side and gave himself up willingly, which surely made the decision a lot easier.