YOU SAID:
The person who killed your killer has been killed
INTO JAPANESE
あなたの殺人犯を殺した人は殺されました
BACK INTO ENGLISH
The person who killed your murderer was murdered.
INTO JAPANESE
あなたの殺人犯を殺した人は殺されました。
BACK INTO ENGLISH
The person who killed your murderer was murdered.
You've done this before, haven't you.