Davis says not only has David Miscavige never been violent towards anyone, he says it was in fact Marty Rathbun himself who was the violent one.
"The only person I know of who was abusive and cruel was Marty Rathbun," said Davis. "He was an abusive, cruel, and violent man."
Rathbun admits he was violent on many occasions, but says it was because Miscavige urged him to be physical, an allegation the Church denies.
"I have admitted that I have engaged in stuff," he said. "...It wasn't in my nature, whatsoever."
"[Miscavige] created an environment where he was getting others to do the same," said Rathbun. "And I broke down and I punched Mike Rinder pretty hard a couple of times. ... a man I had known for decades ... And that's precisely the thing. It made me feel terrible. It made me sick to my stomach."
Mike Rinder corroborated to ABC News that he was a victim of abuse at the hands of Rathbun. But violence, according to Bruce Hines, wasn't the only tool used to discipline staff.
"I was assigned to the ... Rehabilitation Project Force it's called," said Hines. "Or generally known as the RPF."
The RPF is a disciplinary program for Sea Org members, which Hines says includes manual labor and intensive counseling.
"The question they ask -- Was there an evil purpose or a destructive intention that prompted you to commit that overt?" Hines said. "After many hours of this you start to come up with things like, 'Oh, really ... I guess I must really want to destroy mankind.' Phew, think about that. Six years of that was a lot."
Davis described the program.
"It is a ... a program that, uh, members of the Church's religious order, uh, do voluntarily and are given the opportunity to do if, uh, they're found to have failed in their duties," he said.
Hines says when he was in the RPF there were periods of time when he could not see his son.
"In this case, the child -- where the RPF was also where the school was. ... I would get to see him sort of run by in the distance sometimes," said Hines. "And we could kind of wave to each other. But I'm not allowed to actually talk to him."
We asked Tommy Davis what the Church's current policy is on the RPF and family.
Nightline: If somebody is married and they're sent to the RPF
Nightline: ... are there controls placed on how much they can see their family?
Davis: Uh, there ... there's ... there's specific policies which apply to the Rehabilitation Project Force, which govern, uh, how the person doing the program, uh, you know, what they do, what their schedule is.
Nightline: And how much time in a week would an individual be allowed to see their family in the schedule?
Davis: Oh, I don't know. I don't know off the top of my head.
Nightline: Once a week?
Davis: Probably, yeah, I would imagine once a week would ... sounds about right. Yeah.
Nightline: Does that sound appropriate ...
Davis: ... I think so. Yeah. Sure.
During his time in the RPF, Bruce Hines says he received some sad news about his marriage.
"I was married to another Sea Org member who was not in the RPF, and she decided she wanted to divorce me," said Hines. "This was very, very common. Someone in the RPF, their spouse would divorce them because ... they would receive pressure to do it."