The line "I guess there's a need for that kind of person to exist to do our dirty work." made me suspect he was talking about killing not murdering (I presume

The line "I guess there's a need for that kind of person to exist to do our dirty work." made me suspect he was talking about killing not murdering (I presume he wouldn't say that about murderers.) His response to me seemed to confirm he was using the word murder in a loose sense to include lawful killing.. that's how I read it anyway. Also, I didn't say he used the term "badly", I wondered if he was using it precisely. Maybe you think linguistic imprecision is bad, but my intent was to suss out his meaning, not criticize how he uses language. I'm more interested in the meaning behind the words.