U.S. Rep. Darrell Issa pressed Attorney General Eric Holder to come clean on Operation Fast and Furious — saying new information from wiretaps indicated that top White House officials knew more about the ill-fated gunrunning scheme than they have told Congress.

“The wiretap applications show that immense detail about questionable investigative tactics was available to the senior officials who reviewed and authorized them,” Issa, R-Calif., said in letter data on Tuesday, according to Fox. “The close involvement of these officials — much greater than previously known — is shocking.”

Issa, chairman of the House Oversight and Government Reform Committee, added: “Throughout the course of the congressional investigation . . ., the [Justice] Department has consistently denied that any senior officials were provided information about the tactics used in Operation Fast and Furious.