After four weeks of trial, the jury took just 7 hours to convict Eric Naposki of Bill McLaughlin's murder.
"They just made a mistake. And there's no other way to look at it," Naposki told Roberts. "I thought that you had to be convicted on evidence, not suspicion, not lies that you told the police, not Matt Murphy's closing statement.
"There was no plot...cause if there was a plot, then you would have found me, 15 years later, in Nanette Johnston's house," Naposki continued. "...if we accomplished our goal and no one got arrested why did I leave in the first place."
The only person who actually profited from Bill McLaughlin's death, he says, was Nanette. Naposki now suggests that she hired a hit man to kill the millionaire.
"Somebody's out there who killed Mr. McLaughlin. And he's not in jail," he said.
Naposki says there's an easy explanation for why he had Bill McLaughlin's license plate written down.
"The license plate was something? It wasn't," he explained. "That license plate number has nothing to do with the murder at all."
Instead, he says it had everything to do with Nanette. After she led him to believe Bill McLaughlin sexually violated her, he told Nanette to leave the house she shared with Bill.
"'Move out,'" Naposki said. "'Get away from him. It's obviously a dangerous situation.'"
He says Nanette told him -- don't worry -- McLaughlin was leaving. Only Naposki didn't believe her.
"I called a buddy of mine," he told Roberts. "I wanted her followed to see what she was doing."
Naposki says his friend told him McLaughlin's car was still at the house - and gave Naposki the plate number.
"See I was catching on to her. ...I knew something was fishy," he said. "I regret not walking, but I didn't walk."
"So you didn't have Bill's license plate so you could stalk him?" Roberts asked.
But sources tell "48 Hours" that investigators have looked into Naposki's story about his friend and the license plate - and it didn't happen. Still, Naposki says none of this would have mattered had he been able to prove his alibi by showing the jury his lost phone record.
"What this trial really came down to was missing information, information that I could no longer get," he said. "If I'm gonna do the rest of my life in jail, right, because I didn't have a phone bill, then...there's something really wrong with our system. ...I won't stop. I'm not gonna let it go. ...I don't' see any other way but going home, because I'm innocent...I will go home."
But for now, Eric Naposki is looking at the possibility of a life sentence.
"He made the decision to murder another human being," said prosecutor Matt Murphy.
"Our world is definitely a safer place now that he'll be locked away forever," said Kim McLaughlin.
For Bill McLaughlin's children, the pain of losing their father was compounded by the drowning death of their brother, Kevin, in a 1999 surfing accident.
"My dad couldn't be there for...Kevin's funeral. It would've been nice to have my dad for all of that. Eric took him away from us," Kim said. "I'd like to confront him face to face and tell him -- tell him how hard this has been."
For almost two decades, they've tried to put the horror of their father's murder behind them by honoring his life.
"He taught us to be grateful for what we had and really appreciate it because he worked hard for our good fortune and we've been blessed," Kim said. "Let's pass it on, pass it along. And to this day, we do, in his memory ... We know his spirit is with us."
But they say they won't really be able to move on until Nanette is forced to pay the death of their father.
Their hopes could soon be realized. Nanette Johnston will finally stand trial for murder in early November 2011. **
"We have half closure now and it was really satisfying and -- to have Nanette convicted as well, and put away for good -- will be a closing circle for us," said Kim.
Nanette Johnston sued the McLaughlin family soon after his murder for money she felt she was entitled to. They settled for $220,000.
Eric Naposki's lawyers have filed to overturn his conviction. They argue favorable evidence was lost because prosecutors waited so long to file charges.
**Nov. 4 case update:
In a court appearance on Nov. 4, prosecutor Matt Murphy presented new information that he says Eric Naposki shared with authorities after his conviction.
Naposki told prosecutors and police that Nanette Johnston had asked him to kill Bill McLaughlin. He says he refused, but Naposki did give her the name of someone who could hire a hitman. According to Murphy, Naposki also told authorities he was sure that it was his gun that was used in the murder.
Murphy introduced the information in court in an argument to oppose a delay in Nanette Johnston's trial slated to begin this month. The trial has been postponed until Dec. 29.