>> reporter: noel stevens pleaded guilty to several charges, including murder, and spent the next three years cooperating with the investigation. stevens was later sentenced to 42 years to life. george, who pleaded not guilty, set up a ministry in the clark county detention center. and george's sister maria remained convinced he did not do it. >> why, the age-old conclusion, the husband always does it. >> he was a statistical suspect from day one, for sure. my opinion is, they sandbagged around that to make a case. >> reporter: why, she asked, would anybody believe an addict and known liar over george? and the detectives' theory that a guilty conscience led to a suicide attempt? that was hog wash, said maria. >> but let me tell ya, he has been on suicide prevention squads, he's an emt. he is quite knowledgeable about what it takes to kill yourself in a vehicle. so, driving that large vehicle into a k-rail with your seat belt on is not how an expert