Moniruzzaman, when questioned by the German police, admitted to stealing Valeo’s software and using the code while employed at Nvidia, according to the court filing. The filing adds that he was convicted in Germany for unlawful acquisition, use and disclosure of Valeo’s trade secrets in September this year.
So, the events of the call are not in question. He had the code on his screen, participants saw it before he did and took a screenshot so he later admitted it. He had source code open and directory structure included everything like ValeoDocs etc.
What is in question is that Nvidia claims that afterwards they removed his contributions. Obviously, as all of us working in big software projects know, that's not exactly doable if it's someone who's been part of our team working for a while...