The state of Maryland on Tuesday sued the U.S. Department of Homeland Security, alleging it illegally “stonewalled” the state’s investigation into conditions at the George H. Fallon Federal Building in downtown Baltimore where immigrants were being held.

Attorney General Anthony Brown, a Democrat, said his office’s Civil Rights Division and Federal Accountability Unit in January launched an investigation into the conditions inside the detainee holding rooms.

The probe followed reports in The Banner last year that Immigration and Customs Enforcement agents were holding undocumented immigrants in what had been described as inhumane conditions.

Filed in the U.S. District Court in Baltimore, Maryland’s lawsuit alleges that the immigrants were denied basic hygiene and legal rights.

Brown said at a news conference Tuesday that his office filed the lawsuit after the administration of President Donald Trump “stonewalled us at every turn.”

“They missed their own deadline,” Brown said. “They rejected our subpoena outright.”

Brown described the lawsuit as an effort to get a court to order the Trump administration to disclose documents related to complaints, requests for legal counsel, contracts for food service and transport logs, among other records he said the federal government was obligated to disclose.

“We hope to find the truth. We hope to uncover what is actually happening. What members of Congress saw yesterday was a facade,” Brown said, referring to federal lawmakers who were shown empty cells during their visit Monday.

Brown said his office did not know what happened to the immigrants held in the cells who were apparently moved before lawmakers visited.

A DHS statement sent to The Banner Tuesday afternoon described the allegations in Maryland’s lawsuit as false.

The statement claimed that immigrants detained in the Baltimore building, which it described as a processing facility, receive food, water, blankets and medical care.

It also encouraged undocumented immigrants to self deport, noting the U.S. offers $2,600 and a free flight out of the country.

The attorney general’s office said its investigators interviewed immigration attorneys about their clients in detention, reviewed public records and analyzed detention standards. The probe, the complaint said, found conditions inside the holding rooms as recently as February mirrored the substandard conditions at the facility first revealed by tThe Banner last year.

According to the complaint, ICE denied dialysis to a person who was in renal failure, prompting the immigrant to waive their legal rights and be deported so they could receive medical care outside the country. Another detainee, who was diabetic, allegedly experienced a “health crisis” because they were denied medication for several days.

The complaint also cited whistleblower allegations that people detained in the Fallon Building were given filthy blankets and denied menstrual hygiene products.

ICE kept more than 120 immigrants in the facility at one point, despite it only being designed to hold 56, Brown told reporters. He added that detainees were regularly held for 72 hours or more in rooms that were meant to hold people no longer than 12 hours.

In a statement Tuesday, Maryland Gov. Wes Moore described the allegations as “deeply disturbing” and said they merited “full investigative cooperation.”

Brown’s office also mentioned in its complaint a separate federal lawsuit brought by immigrant advocates that resulted in a judge ruling Friday that ICE must limit the number of detainees in the Baltimore facility. The attorney general filed a brief in support of the plaintiffs in that lawsuit, which is ongoing.

State prosecutors on Jan. 30 sent a subpoena to DHS demanding that the agency produce records related to the ICE holding facility in Baltimore. The subpoena, according to the complaint, was justified under state law authorizing the release of records for an investigation into civil rights violations. Brown’s office demanded a response in 14 days.

The complaint said the attorney general agreed to a brief extension request by an ICE attorney, but that ICE then blew past its own deadline.

About a month after the attorney general subpoenaed DHS, lawyers for the agency denied the legal demand, alleging that it was overly broad and could violate privacy protections.

“This administration has a pattern of trying to hide what’s happened inside,” Brown told reporters. “We’ve given the administration every opportunity to comply with the law and they have chosen not to. So today, we are going to court.”