All we know for sure is a lot of alcohol was involved and who knows what really happened.
The captain on the yacht talks about the night of Natalie’s death at this link:
https://www.youtube.com/watch?v=MWIqMcFTtNI
Yes they were all drinking and a bad fight ensued. Wagner really should of been held to account for what happened on that yacht that night. Plus as I recall a nearby ship heard a woman screaming for help that night and they also heard a man laughing at her cries. Very disturbing information for what happened that night.