He wasn't actually asking about the blade user and the poisoner.
The blade user was obviously defiant, showing a certain disregard for life and death.
As for the poisoner... at this point, he probably couldn't say anything.
The bound ones looked at each other; some, seeing the tragic scene before them, wanted to speak out but heard the blade user scoff:
"If you speak…"
Before he could finish, Su Mo delivered a kick to his face, pressing down slightly and a crack was heard.
The bones in his face had been crushed into a different shape.
The rest of his words were swallowed back into his stomach.
"A wise man submits to circumstances."
Su Mo spoke softly, "Gentlemen, just speak freely. It is said that the law does not punish the masses. Today I, Su, am only punishing the chief culprit. If you reveal everything I want to know, I can spare your lives."
Dealing with these people, Su Mo didn't even bother to use the Suffering People Scripture... they were not worthy.