An independent panel is now calling for a thorough reform of the American secret services.

The committee investigating the July 13 attempted assassination of former President Donald Trump at a campaign rally in Butler, Pa., released a 52-page report Thursday, saying the Secret Service needs of “fundamental reform” and new leadership.

“The work of the independent review panel revealed not only many of the errors that led to the events of July 13 in Butler, Pennsylvania, but also deeper systemic problems that urgently need to be addressed,” the authors wrote of the report in a letter to Homeland Security. Secretary Alejandro Mayorkas.

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“Thousands of men and women have dedicated their lives to the Secret Service, and we remain grateful to them for their courage, selflessness and willingness to play a vital role,” the letter said. “But the Secret Service, as an agency, needs fundamental reform to carry out its mission. Without this reform, the Independent Review Board believes another butler can and will happen again.”

The independent review identified key failures that the Secret Service experienced on the day of the assassination attempt.

Trump, who was injured in the right ear in the attack, was speaking to supporters when a gunman fired several bullets at him from a nearby rooftop. A Secret Service sniper returned fire seconds later, killing the gunman.

At the same time, officers rushed Trump from the stage as he raised his fist to the sky to signal to his supporters that he was OK. The shooting injured Trump and two of his supporters and killed retired firefighter Corey Comperatore.

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The incident came under scrutiny from the agency as questions emerged about how a gunman was able to access the roof so close to the rally and shoot directly at the former president before Secret Service agents intervened.

Last month, Acting Secret Service Director Ronald Rowe Jr. acknowledged the agency’s failures, saying agents’ “complacency” also played a role in the day’s events.

“This is a failure on the part of the United States Secret Service,” Rowe Jr. said at a news conference. “It is important that we take into account the failures of July 13 and use the lessons learned to ensure that we do not have a failure like this again.”