AUSTIN — Federal fraud charges filed against Texas Attorney General Ken Paxton should be tossed for a second time, the Republican's lawyers argued Friday.

One month ago, a federal judge dismissed securities fraud charges that the Securities and Exchange Commission had lodged against Paxton. But the SEC refiled the charges soon after, a move that Paxton's attorneys called a weak "do-over" of their first effort.

"As the Court said four weeks ago, the SEC's original complaint had no legal basis. Our motion to dismiss filed today explains why the SEC's new complaint fares no better," Paxton's attorney Matthew Martens said in a written statement. "The reason is simple: Mr. Paxton did not commit securities fraud."

Read: Ken Paxton motion to dismiss federal charges

Paxton is accused of convincing investors to buy stock in a North Texas technology firm without telling them he was being paid by the firm. He faces criminal charges in Texas based on the same allegations.

Paxton's mug shot, taken at the Collin County Jail in August 2015.

Late last month, the Texas Court of Criminal Appeals upheld his criminal indictments. The trial in that case will take place in Collin County, where Paxton lives, and will probably kick off in the spring.

Bill Mateja, an attorney on both Paxton's state and federal cases, said "the SEC's 'do-over' illustrates the weakness of its case and begs the question: If their new information is so significant, why are we now just hearing about it?"

Understanding the charges against Paxton

Texas vs. Paxton (state criminal case)

Current status: Paxton is probably headed to court, but his lawyers are asking the Court of Criminal Appeals one final time to reconsider throwing out his indictments.

Charges: Two first-degree felonies for securities fraud and one for failing to register with the state as an investment adviser representative.

Allegations: He is accused of convincing others to invest in Servergy Inc. without disclosing that he received a commission for doing so, as well as receiving a commission from people he steered to his investment adviser without registering with the state as the adviser's "representative."

Defendants: Paxton is the sole defendant. The state is represented by special prosecutors Brian Wice, Kent Schaffer and Nicole DeBorde.

Possible sentences: Five to 99 years in prison, plus a fine of not more than $10,000 for each first-degree felony charge; two to 10 years plus a fine of not more than $10,000 for the third-degree felony charge.

Securities and Exchange Commission vs. William E. Mapp III, Warren K. Paxton Jr. (federal civil case)