(Reposted in here because this is the more correct section.)
So the situation is this: I run a project which is a fork of an emulator licensed under GPL v2, my fork respects that and has not changed the license. Last year, a contributor joined my team and then this year, he quit the team due to a disagreement. He then forked my project.
Now the things he did that I am concerned about are two:
1. He relicensed his fork as BSD 3-clause, keeping individual GPL v2 licensed files GPL v2, but changing the overall project license - is that allowed?
2. On his fork's website, he is distributing Linux binaries of his fork but has to this day not released the source code of the Linux-specific parts, claiming on his site that he is going to as soon as he deems it ready for release - is that allowed?
Now my question is, how to proceed with this. I already tried to talk to the fork's maintainer before about this, and every time I did, he either ignored me or told me that he had consulted with a lawyer who is allegedly an expert in this stuff and that said lawyer said what he's doing is allowed, and that therefore I should take it to the lawyer.
To make things even more difficult, I am in the EU while he is in the US.
So now I wonder what to do next. – J. de C. Aug 10 '18 at 03:31