Homeland Security Secretary Markwayne Mullin said Friday that federal investigators have a “strong case” in an investigation into possible immigration fraud involving the family of Rep. Ilhan Omar, D-Minn., revealing that agents executed multiple search warrants earlier this week.

Speaking on the Charlie Kirk Show podcast with host Andrew Kolvet, Mullin said investigators expect to take their findings to a grand jury following searches conducted Monday.

“She wasn't, or it wasn't the only place we served the warrant,” Mullin said, referring to the search of Omar’s Washington, D.C., residence.

“There were multiple other warrants served on that same day. We had a judge sign it, and we expect to be able to take the case to a grand jury,” he added.

Mullin defended the investigation against accusations of political retaliation, saying President Donald Trump wanted assurances that the case was supported by evidence rather than political considerations.

“We wouldn't move forward, and President Trump didn't want to move forward either, unless we knew that it couldn't be politically driven,” Mullin said. “This was about enforcing, once again, our nation's laws. And it's a strong case.”

Multiple relatives of Omar received grand jury subpoenas last Friday, three days before federal investigators searched her residence and seized her personal cellphone, according to CBS News.

The investigation, led by Homeland Security with assistance from the Justice Department, is examining allegations of false statements and fraud involving immigration paperwork reportedly submitted by Omar’s late father when she was a child.

Mullin also raised the possibility that coordinated immigration fraud could fall under the federal Racketeer Influenced and Corrupt Organizations Act, commonly known as RICO. He discussed a hypothetical scenario involving fraudulent immigration documents used to bring additional people into the country, suggesting such conduct could amount to a conspiracy to deceive the government.

However, Mullin did not say prosecutors were pursuing racketeering charges against Omar. Federal criminal racketeering charges generally carry a five-year statute of limitations, although older conduct can sometimes be included in a timely prosecution involving an ongoing conspiracy.

Omar has not been charged with a crime and has denied wrongdoing, accusing the Trump administration of using federal law enforcement to target political opponents.

“Make no mistake: this is an attempt to target political enemies and weaponize federal law enforcement,” Omar wrote in a Monday post on X. She also accused Trump of targeting her with what she described as baseless allegations for the past decade.

Trump denied involvement in the investigation during a Thursday interview with Newsmax at the White House.

“She’s just a troublemaker. But I’m not involved in it. I think she’s very bad for our country,” Trump said.

The investigation remains ongoing, with Mullin indicating that federal authorities intend to present their findings to a grand jury as the inquiry proceeds.