Mike Jones is a man on a mission and today his persistence may finally pay off.
Jones is meeting with the FBI in New York -- hoping to convince them to take over the George Smith investigation.
"There's a lot riding on today's meeting," Jones explained. "The New York office just makes sense. It's a bigger office, they have more - capabilities. ... They are more experienced with big cases."
And two of the men in question live in New York: Zach Rozenberg and Rusty Kofman, who is now a practicing attorney. As Jones sees it, a courthouse is exactly where these men belong.
"This is a case that should be solved. It's a case that -- frankly, I think it is solved. It's just a question of pulling together enough evidence to get an indictment and a conviction," he said.
And while Jones waits for an answer from the FBI in New York, the Smiths maintain the key to solving the case lies in California.
"Our theory is that Josh Askin knows what happened," Mike Jones said. "But we don't believe that Josh was involved in the actual, you know, tossing of George overboard."
To support his theory, Jones points to an intriguing clue uncovered by Royal Caribbean: a ship employee overheard Josh Askin speaking to a friend on an elevator.
"He said, 'I -- I know more than they think I know. Those [expletive] almost got me arrested in Turkey," said Jones.
Keith Greer argues the comments were taken out of context and Josh has nothing to hide.
"Do you think that Josh Askin has told you everything he knows?" Miller asked Greer.
"Absolutely, no doubt," he replied.
But Greer admits the FBI told Askin he failed a polygraph. Greer questions the test and the result.
"I think it's another rubber-hose ploy, you know, where just to freak Josh out and upset him more," Greer told Miller. "I think it was just the psychological war that they were waging on him and his family. ... Or they didn't take the time to do it right, one or the other."
Sources tell CBS News Rusty Kofman also was tested, and he too failed.
As for Greg Rozenberg, he was administered a private polygraph test:
Greg Rozenberg deposition: I took a polygraph but it was inconclusive because I'm ADHD as you can tell I like to move a lot. It was inconclusive ... ain't no lies that I need to tell.
According to Phil Houston, a former CIA case officer who for more than two decades specialized in detecting deception, "Generally it's much easier to tell the actual lie on your own."
"48 Hours" decided to bring in Houston to take a closer look at those depositions.
"Is there anybody of the group that particularly jumps out?" Miller asked.
"Greg stands out -- above and beyond everyone. There was just a ton of deceptive behaviors," said Houston.
In Houston's opinion, it's not what Greg Rozenberg says that seems deceptive; it's often what he doesn't say.
"What we should hear and see his focus on, 'I didn't do it. It wasn't me. You got the wrong guy.' But 'we' -- instead, 'we don't.' Where we hear his focus so many times are reasons why he wouldn't do this," he explained.
Greg Rozenberg : I in no way shape or form would ever do anything like that to an individual ...that's not me.
And it appears some questions are more difficult for Greg than others:
Mike Jones: Did they -- now did they find anything in either room that, that was connected to George's disappearance
"He hesitates. He's clearly thinking. The question has thrown him for a loop. It's almost, 'What could they have found that -- that would've connected someone to the disappearance?" Houston said of Greg's reaction.
Greg Rozenberg: [Pause] No.
Mike Jones: OK ...
Greg Rozenberg: No. No, of course not.
"And then it's like, as he thinks through it, he realizes, 'I've gotta answer the question.' So he goes,
"Well, no. N - no," said Houston.
"So he's thinking about something that is not gonna come out in his answer," Miller noted.
"That's correct. That's correct, something he's not sharing."
But Greg Rozenberg doesn't hold back on the one thing the Smiths would agree with. He says George's death was no accident:
Greg Rozenberg: George Allen Smith did not disappear, or kill himself or hurt himself, or slip and fall off the boat at 6'4" or however tall he is and just dive off ... I know that didn't happen. So uh ... Some, some, something crazy went down that night. And I hope one day that they find out the truth.
In the years following George's death, Jennifer has remarried and tried to move on. But for the Smiths, that's just not possible. And until the day the case is solved, they vow to not let George's memory die on that ship.
"Do you believe that George knows that you've been fighting -- that the family's been fighting this whole time?" Miller asked Bree.
In tears, she replied, "I do."
"We'll get justice," said George Smith.
"We'll get justice," Maureen Smith agreed. "Somehow we'll get justice for George. Somebody will talk. And shame on them that don't. Shame on the people that have put us through this eight years of hell."
The FBI's New York field office has agreed to review the George Smith case.