On an April morning inside the marble halls of the Milwaukee County Courthouse, a routine calendar of misdemeanor cases was underway in Judge Hannah C. Dugan’s sixth-floor courtroom. What followed would transform an otherwise ordinary court session into a national flashpoint over immigration, judicial authority, and the limits of resistance to federal power.

Eduardo Flores-Ruiz, a defendant facing domestic battery charges, appeared before Judge Dugan that morning. After his hearing concluded, Flores-Ruiz exited the courtroom through a side door — a move witnesses say came at the judge’s urging. Moments later, federal agents pursued him through the courthouse and arrested him on immigration violations.

That brief sequence of events now sits at the center of a federal criminal trial that began Monday. Prosecutors under the Trump administration allege Judge Dugan obstructed a federal proceeding and concealed an individual to prevent his arrest. If convicted, she faces up to six years in prison and the potential end of her judicial career.

The Justice Department claims Judge Dugan intentionally directed Flores-Ruiz, an undocumented immigrant from Mexico, and his attorney away from federal agents who were waiting in the courthouse. Dugan has denied the allegations, maintaining that she did not intend to interfere with federal enforcement and has pleaded not guilty.

The case has captured intense attention in Wisconsin, where debates over immigration enforcement and federal authority have already run hot. To critics of the administration, the prosecution represents an aggressive attempt to punish perceived defiance. To others, it is a necessary check on a judge accused of abandoning impartiality in favor of personal beliefs.

Legal experts say the facts themselves may not be deeply contested. What prosecutors must prove is intent — that Judge Dugan acted with a deliberate motive to prevent federal agents from doing their jobs.

Federal agents testified that Judge Dugan became visibly upset upon learning immigration officers were present in the courthouse. According to their accounts, she described the situation as absurd and reacted angrily. At the time, courthouse arrests by immigration agents were uncommon and widely opposed by judges, prosecutors, and public defenders, who argue such tactics discourage defendants and witnesses from participating in court proceedings.

A jury drawn from 12 Wisconsin counties was selected last week and includes nine men and five women, with two alternates to be dismissed before deliberations. The trial is being overseen by U.S. District Judge Lynn Adelman. Federal prosecutors are expected to call at least nine law enforcement witnesses from agencies including the FBI, Immigration and Customs Enforcement, the Drug Enforcement Administration, and Customs and Border Protection.

Other witnesses may include fellow Milwaukee County judges, as well as former Milwaukee Mayor Tom Barrett, a longtime acquaintance of Judge Dugan.

Public reaction has been sharply divided. Some residents believe the judge crossed a line by intervening in immigration enforcement. Others see the prosecution as political retaliation against a jurist known for progressive views and advocacy for marginalized communities.

Since Judge Dugan’s arrest, protesters have regularly gathered outside the courthouse in downtown Milwaukee, with demonstrations expected to continue throughout the trial. The Trump administration has framed the case as a warning to judges nationwide, signaling that interference with immigration enforcement will carry consequences.

Judge Dugan was first elected in 2016 and ran unopposed for reelection in 2022. A longtime advocate for low-income and marginalized clients, her legal career included work with Legal Action of Wisconsin, Catholic Charities, and Legal Aid. She has been on administrative leave since April and was temporarily removed from the bench by the Wisconsin Supreme Court while the case proceeds.

Flores-Ruiz later pleaded guilty to illegally reentering the United States after a prior deportation and was removed to Mexico in November. As his case closed quietly, the legal storm surrounding Judge Dugan has only intensified — turning a side-door exit into a defining moment for the Wisconsin judiciary and a broader national debate over power, punishment, and the rule of law.