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. >> just like the movies. >> right. >> reporter: peterson's attorney, dave rudolf, says it does not look to him like objective science. >> they come to the belief that someone is guilty. they don't have the -- the evidence that they think they need to convict the person, and so they make it up. >> reporter: rudolf signed back on to michael's case, this time without pay, and began to dig. he discovered that at the peterson trial, duane deaver had not been truthful about his professional experience on the