That's the story, anyway, that he meant to say no one was killed. In fact, his people claim that as he was waiting in the Green Room for the interview, the TV was playing clips involving people who were injured in it.
He's too lazy-minded to be a serious candidate, though, and he may have something much worse wrong with him than being a pothead or ex-pothead or whatever. He'd be prepared if it really meant something to him, and he's not. At this point, he's probably thankful to have failed at making the first debate.