DUBUQUE, Iowa — A math teacher at Hempstead High School in the Dubuque Community School District has resigned in the wake of serious federal allegations involving child exploitation and child pornography. The case has raised significant concern among students, families, and the local community.

Andrew Roos, 35, who had been with the district for over a decade, was placed on paid administrative leave in May 2025 following the start of a police investigation. He later resigned from his position. In May 2026, federal authorities unsealed an indictment charging him with six counts related to child exploitation. These include attempted sexual exploitation of children, along with charges involving the transportation, receipt, distribution, and possession of child pornography. 

Court documents allege that Roos attempted to persuade or entice minors to engage in sexually explicit conduct for the purpose of producing visual depictions. The activity is said to have occurred over several years at Hempstead High School. Materials reportedly included AI-generated images of students and other content shared via online platforms. 

A search warrant led to the seizure of two pens with hidden cameras and a USB drive from his classroom. The investigation was reportedly prompted by alerts from the National Center for Missing and Exploited Children (NCMEC) regarding potential child sexual abuse material. 

The Dubuque Community School District stated it cooperated fully with law enforcement after being notified of the investigation. Officials placed Roos on leave immediately and conducted their own internal employment review. In a statement, the district said actions like those alleged “have no place in our schools or community” and emphasized support for students and families. 

Former students have expressed feelings of betrayal, with some describing the news as potentially long-lasting and traumatic for those affected. 

Roos has pleaded not guilty to the charges. If convicted on all counts, he faces a mandatory minimum of 15 years in prison and a potential maximum exceeding 100 years. 

The case underscores ongoing challenges related to student safety, the responsible use of technology, and maintaining trust in educational environments. The district has made counseling resources available to those impacted.

This situation serves as a reminder of the importance of vigilance in protecting minors. All individuals are presumed innocent until proven guilty in a court of law.