reporter julia sims. lked to the jurors in this case, julia, how important was the blood expert, dever's testimony. >> that blood evidence was critical. here's a guy who has been doing this for years for the state, look what his experiment showed, it's got to be the truth. >> reporter: the newspaper recounted the story of a man who was sent to prison for murder after dever's lab report suggested a stain on the man's car was the victim's blood. >> and it turned out not to be blood. >> reporter: it wasn't blood at all. >> no. >> reporter: and dever knew and didn't disclose it. >> dever knew that that was not blood and didn't disclose it. >> reporter: that man's conviction was overturned. >> innocent of the charge of first-degree murder. >> reporter: and there was more evidence of questionable conduct linked to dever, the newspaper investigation suggested that the methodology behind some of the blood pattern experiments he was involved in were flawed, designed to produce pro prosecution results, like this tes