Buried Secrets side quest (spoilers)

[Triga]

So I am at the end of this quest and we fin out the guy who gave it to us was part of the death of the people. All of the responses is the conversation options require some kind of stat, like might, resolve ect. So I am forced to let this known killer go because I do not have some arbitrary stat.

 

This is horrible design. I understand that having specific stats can and should give you "extra" options, but should I be should horned into only one option for this quest as a penalty?

[Sonntam]

You can still kill him, what's the problem?