YOU SAID:

if you kill a killer, the amount of killers remain the same

INTO JAPANESE

殺人犯を殺せば殺人者の量は変わらない

BACK INTO ENGLISH

Killing a murderer won't change the amount of killer.

INTO JAPANESE

殺人犯を殺しても殺人犯の量は変わらない。

BACK INTO ENGLISH

Killing a murderer does not change the amount of the murderer.

INTO JAPANESE

殺人犯を殺しても殺人犯の量は変わらない。

BACK INTO ENGLISH

Killing a murderer does not change the amount of the murderer.