Federal agents have reportedly raided the Chicago City Hall office of a lawyer who previously did tax work for President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE.

The Chicago Sun-Times reports that federal agents removed everyone from the office of Chicago Finance Committee Chairman Ed Burke on Thursday morning, covering the floor-to-ceiling windows with brown paper.

Source says feds showed up this am, asked everyone to leave and put brown paper on the doors. pic.twitter.com/4qJBwzoKF4 — Fran Spielman (@fspielman) November 29, 2018

A spokesman for the U.S. attorney’s office declined to comment when contacted by the Sun-Times. A man who answered the door of the office when a reporter knocked also declined to comment.

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Burke's office did not immediately respond to The Hill's request for comment.

Burke worked for Trump for more than a decade doing property tax work.

Burke’s law firm of Klafter & Burke has worked with Trump’s companies repeatedly to reduce the property tax that Trump Tower and his other properties in Chicago have had to pay, according to the Sun-Times.

Over his 12 years working for Trump, Burke was allegedly able to cut the property taxes on the downtown tower by more than $14 million.

Burke stopped working for Trump this summer, citing “irreconcilable differences” in letters filed with the Illinois State Property Tax Appeal Board.

The federal agents appearance at the Chicago office of Burke’s takes place on the same day Trump’s former personal attorney Michael Cohen entered into a plea agreement to cooperate with special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s investigation into Russian interference in the 2016 election.

Last week, Trump submitted his written answers to a list of questions from Mueller, whose probe he has repeatedly dismissed as a "witch hunt."

Updated at 1:13 p.m.