text:  It's my defense mechanism. Some defense. If I was the killer, I would kill you next. But his first brush with showbiz was as a songwriter. A year after A Boy Named Sue was a big hit for Johnny Cash, he wrote a response called A Girl Named Johnny Cash. Who knew? Martin Mull was 80. This is CBS News. Think O'Reilly Auto Parts for all your car care needs. Get the parts and service you need fast from the professional parts people at O'Reilly Auto Parts.