YOU SAID:
I just mudered someone
INTO JAPANESE
私は誰かを台無しにした
BACK INTO ENGLISH
I ruined someone
INTO JAPANESE
私は誰かを台無しにしました
BACK INTO ENGLISH
I spoiled someone
INTO JAPANESE
私は誰かをだめにした
BACK INTO ENGLISH
I spoiled someone
Come on, you can do better than that.