Dubuque, IA — Adrian John Hartung, 43, was arrested Monday morning on two probation violation charges — one misdemeanor and one felony — at 265 Valley St. in Dubuque.

The arrest occurred at 6:24 a.m. on April 6, 2026, under report AR 2026002213. Officer B. Barbour made the arrest. Hartung, remains in custody at the Dubuque Law Enforcement Center.

Probation violations in Iowa arise when supervised individuals fail to meet court-ordered conditions, such as reporting, drug testing, or avoiding new offenses. Technical breaches are often misdemeanors, while more serious or repeated violations can be charged as felonies.

Hartung has a documented history of contacts with Dubuque authorities. In April 2024, at the same Valley Street address, he was arrested on a felony controlled substance violation, a misdemeanor probation violation, and interference with official acts. Earlier records also note substance-related and probation issues.

He will appear in Iowa District Court for Dubuque County for an initial hearing, where a judge will address bond and schedule further proceedings, potentially including a probation revocation hearing. Outcomes could range from modified supervision to revocation and imposition of any suspended sentence.

Dubuque police have released no additional details on the specific reasons for the violations. As with all arrests, Hartung is presumed innocent until proven guilty.