The outside of the International Brotherhood of Electrical Workers Local 98 headquarters is wrapped with “Hillary for President” signs. But federal agents are more concerned about what’s inside the building.

Philadelphia’s most powerful construction union was raided on Friday morning by federal agents who arrived in a Penske box truck. As seen in the video below, the feds confiscated droves of boxes of evidence from the union hall.

The feds also raided the home of union leader, John “Johnny Doc” Dougherty.

The raids come on the heels of the Democratic National Convention in Philadelphia.

According to Heat Street, Johnny Doc had accompanied Philadelphia Mayor Jim Kenney and Congressman Bob Brady for a meeting with Hillary Clinton to discuss union issues, including project-labor agreements, posing for a photo with her:

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And in June, Johnny Doc inked a project-labor agreement with the DNC, vowing not to strike or picket; in exchange, Democratic officials used union labor for hundreds of convention-related positions. Johnny Doc posted Facebook photos of himself at the convention site last week and told the Philadelphia Inquirer his union spent more than $80,000 on parties attended by local power brokers.

Reportedly, the investigation involves agents from the Federal Bureau of Investigation and the Internal Revenue Service, focusing on the “alleged misuse of union funds.”

Below is a Facebook LIVE video captured during the raid: