An angry judge in Boston is holding a U.S. Immigration and Customs Enforcement agent in contempt after he detained a suspect while the man was on trial.

ICE agent Brian Sullivan detained Wilson Martell-Lebron last week as he was leaving court. But a Boston Municipal Court judge issued a ruling Monday against Sullivan, arguing that he had deprived Martell-Lebron of his rights to due process and a fair trial by taking him into custody.