Crime Juror Recalls the Exact Moment He Knew Scott Peterson was Guilty In a new interview, juror John Guinasso recalls the testimony of Peterson's infidelity By Steve Helling Published on August 22, 2015 01:05 AM Share Tweet Pin Email Photo: Modesto Bee/AP Photo When Scott Peterson went on trial for the 2002 murder of his wife, Laci, and unborn son, Conner, the jurors didn’t want to believe that he was guilty. After all, Peterson was a charismatic, good-looking defendant who seemingly had a lot to live for. “Looking at Scott from less than 20 feet away, it was hard to believe that he could actually murder his wife,” recalls juror John Guinasso in a new TV docuseries. “He didn’t look like that type, physically. He was well groomed; he looked like your everyday businessman.” Guinasso, who hasn’t spoken publicly for several years, recalls the case on Murder Made Me Famous, a new docuseries on the Reelz Channel. According to Guinasso, everything changed when he heard tapes of Peterson speaking with girlfriend Amber Frey, with whom he has having an affair. “The Amber Frey tapes exposed him not telling the truth on several occasions,” says Guinasso. “He’s romancing another woman and then hiding out in parking lots, not even looking for his wife.” Other red flags: Peterson began renting porn on his cable TV service – seeming unconcerned that the records would be on his bill. “You’ve got to remember,” says Guinasso. “Laci was a conservative, so he knew she wasn’t coming back.” Guinasso and the other jurors found Peterson guilty in 2004 and sentenced him to death. Murder Made Me Famous combines reenactments, exclusive interviews and never-before-seen photos and video to tell the story of infamous murders. Each episode of the show features PEOPLE Senior Writer Steve Helling. The show airs Saturday night at 9 p.m. ET on the Reelz Channel. Last week’s debut episode was the highest rated series premiere in Reelz history. Want to keep up with the latest crime coverage? Click here to get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter.