Hillary Clinton’s former chief of staff and two other aides were granted immunity by the FBI during an investigation into the Democratic presidential nominee’s use of a private email server when she was secretary of State, Rep. Jason Chaffetz told The Associated Press.

The Utah Republican said Friday that Clinton’s former chief of staff Cheryl Mills gave federal investigators access to her laptop under the agreement that its contents not to be used against her.

Chaffetz said he was “absolutely stunned” at the revelation.

“No wonder they couldn’t prosecute a case,” Chaffetz told the AP. “They were handing out immunity deals like candy.”

A Clinton campaign spokesman said House Republicans are “trying to make something out of nothing” in a case that was closed months ago.

In July, FBI Director James B. Comey announced that he would not recommend charges against Clinton over her handling of classified emails through a private server set up in the basement of her New York home during her tenure as secretary of State.

He called the practice “extremely careless.”

Earlier this week, Chaffetz, the chairman of the House Oversight and Government Reform Committee, led the passage of a resolution that held Clinton’s former IT specialist, Bryan Pagliano, in contempt of Congress for not complying with two congressional subpoenas issued this month.

The panel has called several administration officials to testify about the investigation into Clinton’s email use since this summer.

Contact Rahman at remarahman@cqrollcall.com or follow her on Twitter at @remawriter.