YOU SAID:

I committed fratricide by defenestrating my brother.

INTO JAPANESE

私は弟を破門して兄弟殺しを犯しました。

BACK INTO ENGLISH

I committed fratricide by excommunicating my brother.

INTO JAPANESE

私は兄弟を破門して兄弟殺しを犯しました。

BACK INTO ENGLISH

I committed fratricide by excommunicating my brother.