Three days after he defended his immigration enforcement agreement with federal authorities before a Maricopa crowd, Pinal County Attorney Brad Miller filed a motion to dismiss the lawsuit challenging the agreement, his office announced in a video on X today.

The motion, filed Friday in Maricopa County Superior Court, asks a judge to dismiss all claims brought by the Pinal County Board of Supervisors and Sheriff Ross Teeple over the county attorney’s participation in the federal 287(g) program, according to a news release issued Tuesday.

“This lawsuit is without merit and should be dismissed,” Miller said in the release.

The case stems from Miller’s decision to enter into a 287(g) task force agreement with U.S. Immigration and Customs Enforcement, which allows certain county attorney investigators to work with federal agents on immigration enforcement.

Last month, Pinal County Superior Court Judge Joseph Georgini temporarily blocked enforcement of the agreement after a legal opinion declared it void in January. In the video posted on X today, Miller said “the chair and the outgoing county attorney colluded … to defy me, your incoming county attorney,” referring to Board of Supervisors Chairman Jeffrey McClure and former County Attorney Kent Volkmer.

In his motion, Miller argues the lawsuit fails as a matter of law on several grounds.

He contends Arizona law prevents local officials from restricting enforcement of federal immigration laws and that the board’s lawsuit directly conflicts with that statute.

The filing also argues the Board of Supervisors’ authority over the county attorney is limited to fiscal oversight and does not extend to directing prosecutorial decisions.

Additionally, the motion states the plaintiffs did not allege that Miller exceeded or plans to exceed his approved budget in implementing the agreement, which he argues undercuts their claims the deal was unauthorized.

The 287(g) agreement, signed in August, allows trained personnel in the county attorney’s office to assist in identifying and removing individuals accused of crimes while operating under ICE supervision.

“I entered into this agreement to protect our communities, enforce the rule of law and restore public safety at the local level,” Miller said Tuesday.

The motion asks the court to dismiss the case with prejudice, which would prevent it from being refiled. The case remains pending.