>> reporter: bill, that's the big question. all along they said that was a possibility. the defense team hinted that would never happen. there are some legal analysts who say you know what? yesterday the witnesses that came through here really gave a great picture of dr. murray. that might encourage the defense to have him testify. but at this hour, bill there is really we're told only two witnesses left. one is an expert who will talk about addiction. the second one is the witness everyone has been waiting for for the defense. that is dr. paul white. you might remember last week we had dr. steven schaeffer. these two men, if dr. murray doesn't testify, they will come down to be the two most important witnesses because a jury will have to believe one or the other. if they believe dr. steven schaeffer. that is great for the prosecution. he says that dr. murray made mistakes on 17 different occasions egregious mistakes. while dr. white is expected to say the exact opposite. bill? bill: they had what, five witnesses testifying yesterday saying he was a great doctor?