So, this is not something thats unbreakable, but it just simply takes a request from the Department of Justice to remove that gag order. If that gag order is not removed, I think its doubtful this businessman will want to go public, because he doesnt want to be put in legal jeopardy.
Seems the businessman started a lawsuit as recently as 2016 to recover funds lost in connection to his testimony being suppressed under color of law.