I didn’t see any crime scene photos, but I have always thought that she was involved. I thought that the US was not going to extradite her though, because she had been exonerated, and it would be considered double jeopardy under US law. The case was a mess, badly prosecuted after being badly investigated. Enough is enough. We will probably never know the truth.
I suspect that the meeting was to discuss the upcoming re-trial and what, if anything that either one could add to help the defense. No big deal.
How would it violate double jeopardy. She was convicted, not acquitted. Even in the U.S., if you were convicted and given a new trial, that would not be double jeopardy.