Gregoryf Taylor News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Scene of a beating. >> reporter: he was a star witness for the prosecution in the peterson trial, the blood pattern expert who put michael peterson in the staircase bludgeoning his wife, reporter julia sims. you talked to the jurors here in this case, julia. how important was the blood expert, deaver's testimony? >> that blood evidence was critical. here's a guy who has been doing this for years for the state. look at what his experiment showed. it's got to be the truth. >> reporter: he'd been key in other cases, too. the newspaper recounted the story of a man who was sent to prison for murder...

>> gregory f. taylor is innocent of the charge of first-degree murder. >> reporter: and there was more evidence of questionable conduct linked to deaver. the newspaper investigation suggested that the methodology behind some of the blood pattern experiments he was involved in was flawed, designed to produce pro-prosecution results. like this test conducted for a 2009 murder case. deaver, videotaping the experiment, was attempting to match a blood stain on the shirt of the accused. >> oh, even better. holy cow. that was a good one. >> that's a wrap baby. >> that's a wrap? >> that's a wrap. >> j...

>> my opinion is that this is scene of a beating. >> he was a star witness for the prosecution in the peterson trial, the blood pattern expert who put michael peterson in the staircase bludgeoning his wife, reporter julia sims. you talked to the jurors here in this case, julia. how important was the blood expert, deaver's testimony? >> that blood evidence was critical. here's a guy who has been doing this for years for the state. look at what his experiment showed. it's got to be the truth. >> he'd been key in other cases, too. the newspaper recounted the story of a man who was sent to prison ...

>> reporter: he was a star witness for the prosecution in the peterson trial, the blood pattern expert who put michael peterson in the staircase bludgeoning his wife, reporter julia sims. you talked to the jurors here in this case, julia. how important was the blood expert, deaver's testimony? >> that blood evidence was critical. here's a guy who has boon -- been doing this for years for the state. look at what his experiment showed. it's got to be the truth. >> reporter: he'd been key in other cases, too. the newspaper recounted the story of a man who was sent to prison for murder after deave...

>> reporter: that man's conviction was overturned. >> gregory f. taylor is innocent of the charge of first-degree murder. >> reporter: and there was more evidence of questionable conduct linked to deaver. the newspaper investigation suggested that the methodology behind some of the blood pattern experiments he was involved in was flawed, designed to produce pro-prosecution results. like this test conducted for a 2009 murder case. deaver, videotaping the experiment, was attempting to match a blood stain on the shirt of the accused. >> oh, even better. holy cow. that was a good one. >> that's a ...