Question:
Shalom dear rabbi, a doubt, a Goy who is in Guiur's process with a BEIS DIN KOSHER, can he enter common justice against a Yehudim Guer who stole his money and deceived his whole family?
Answer:
You can definitely take him to a Jewish Bais Din. As a side point it could be that would be worthwhile for you to wait until after the geirus, However, in order to advice you on this I would need to know the specifics of what happened.
Best wishes
