problem they have is that not one, not two but three of the prosecution's medical examiner experts concluded that cardiac arrythmia may have caused the death. you have to wonder if that's going to get them to that reasonable doubt that the defense needs. the only thing is that recently in other cases we've seen similar evidence be enough for conviction. so it is a question of whether the science will be enough for this jury. >> and paul, the prosecution says that their plan on calling several inmates who are going to testify that mcneal told them he was responsible for his wife's death and that the cops wouldn't be able to pin it on him. i mean, does testimony from inmates hold a lot of weight? >> well, it matters. it depends. each case is unique. but as a juror when you hear information like that you have to weigh and consider it. i think what they're really going to be pushing this jury is to try and present evidence to them to show them just how much influence he had on her exact death.