Paxton's legal team announced late Monday it had filed six motions to quash the three indictments against him, citing problems with the grand jury process. They also raised other objections to the case in four pretrial applications for writ of habeas corpus.
A Collin County grand jury indicted Paxton earlier this year on charges of misleading investors in a technology company before he was attorney general. Paxton pleaded not guilty.
Paxton's legal team has raised the prospect that the grand jury was "empaneled in a matter inconsistent with law." Last month, his lawyers won access to information related to the makeup of the panel.
The special prosecutors handling the indictments have maintained "absolutely nothing improper" happened in the formation of the grand jury. In a statement late Friday, special prosecutor Brian Wice said the motions to quash are "so clearly baseless, neither merits comment."
Paxton's lawyers also announced late Monday they were bringing on board another attorney, Mitch Little of Frisco. Little, who helped with the motions to quash, specializes in securities fraud.