I think nothing of interest will be released. Grand jury testimonies can not be released without a court order. I also don't think the grand jury testimonies will contain anything juicy.
https://islamqa.info/en/answers/7191/what-is-hijrah
Completely different meaning from the one implied.
"Hijrah (emigration) for the sake of Allah means moving from the land of shirk to the land of Islam as Muslims moved from Makkah to Madinah."