DES MOINES, Iowa —

A central Iowa congressman is calling for more clarity about what led to the Des Moines Public Schools' superintendent's arrest by immigration agents .

U.S. Rep. Zach Nunn says he's requesting all documents related to Dr. Ian Roberts' immigration status. He sent a letter to the Department of Homeland Security and published the letter on social media Saturday.

"Like many in our community, I was alarmed to learn that Dr. Roberts was reportedly under an active Biden-era deportation order, and that he was also found in possession of a loaded handgun, a hunting knife, and a large sum of money at the time of his arrest — and that he attempted to flee rather than comply when approached by law enforcement.

"At the same time, it is important to our community to establish a

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