YOU SAID:

My dog has chewed up and murdered my wife.

INTO JAPANESE

私の犬は私の妻をかみ砕いて殺害しました。

BACK INTO ENGLISH

My dog chewed and killed my wife.

INTO JAPANESE

私の犬は妻を噛んで殺しました。

BACK INTO ENGLISH

My dog bit my wife and killed him.

INTO JAPANESE

私の犬は私の妻を噛み、彼を殺しました。

BACK INTO ENGLISH

My dog bit my wife and killed him.