Expert Witness Forty Eight Hours : Season 12 Episode 20

Study after study shows that juries put a great deal of faith in the testimony of expert witnesses. A good expert witness can swing a verdict one way or another. But how reliable are they? CBS News 48 Hours' "Expert Witness" takes a look at several incredible cases in which experts made the difference - sometimes helping the innocent prove their innocence, other times helping send the innocent to jail.