C11 What Exactly Was He Feeling Regretful about

"We were all going to kill you in one strike so we could go back and get our rewards but you chose to seek your own death. You can't blame anyone else!" Boss grabbed his collar and forcefully pulled him up. More blood flowed out from the wound because of the impact...

"But we changed our mind. If the police really received the call just now, none of us brothers..