The papers would have given Biden a "road map" to Ziegler's "most important legal arguments" along with prejudicial advantage, given the former president's son had "yet to file an opposition."
Further, if Biden returned with the case, he would have extra time to prepare for a deposition with information from Ziegler's latest briefing, said Vera.
Ziegler, who had been an aide to trade adviser Peter Navarro, tried to fight back against dropping the case, so he could go after Biden for legal fees.
Biden was to have been deposed on March 10 by Ziegler, who he said hacked his laptop and shared the infamous contents on the conservative nonprofit site Marco Polo.