It's been mentioned before that BP+1 could have emptied the farmhouse and had seen the rape videos, so I've put together a few thoughts on that and how LE could have found out about the videos, the VW camper and MT's possible involvement in this chapter.
This is on the pretense that BP+1 did in fact clear out the farmhouse in PDL:
MT was told about the rape videos and was offered to view them himself (I think he did view them) so he must have seen BP+1 after his release, if indeed it was BP that cleared the farmhouse. Where was CB at this time?
MT informed LE about the rape videos when he was interviewed in Austria.
MT was under orders to keep quiet about the interview by LE, due to the ongoing rape case. In MT's own words:
"Don't have to speak with the press! Police know everything. This is more important! I was not alaut to speak!!!"
German LE go to Borracal to interview BP about the tapes, they locate the VW that MT would have told them about and confiscate it. BP+1 become witnesses in the rape case.
As that case is finished, I think MT saw an opportunity to cash in with his interview, and at the same time spin a story to create some distance between himself, CB and May 03.
I don't think he came forward for anyone's sake but his own. Why hold this info for so many years? I don't believe MT is 100% truthful about some things he says.
It wouldn't surprise me if we get another MT exclusive interview in the near future, maybe a double act with DF
I'm not sure of the reason why BP wanted to help/protect CB so much, especially after seeing the videos. Maybe it all started as BP protecting FP from some stuff that CB had got him messed up in? Maybe the BP/CB connection runs a lot deeper than that?
Anyway, just some thoughts
Edit for fact re-check
I couldn't find my source for when exactly LE confiscated the VW, I believe it was after the MT interview but suddenly having doubts, brains a bit cloudy today
It blows the theory if LE confiscated the VW before MT's interview.