Des Moines Public Schools Superintendent Ian Roberts was placed on unpaid leave on Monday night after the state of Iowa revoked his teaching license. Why it matters: The revocation — just two days after the district initially gave him paid leave — effectively ends Roberts' ability to lead Iowa's largest school district,

The Iowa Board of Educational Examiners has revoked the license of Dr. Ian Roberts, the Des Moines Public Schools Superintendent, who was detained by Immigration and Customs Enforcement in Des Moines on Friday.

The Des Moines School Board placed Roberts on paid administrative leave on Sept. 27, and the Iowa Board of Educational Examiners revoked his license on Sept. 28.

In a letter to Roberts dated Sept. 28, Michael D. Cavin, executive director of the Board of Educational Examiners, wrote: "Our office has received information that you no longer possess legal presence in the United States,