Senior officials of a state anticorruption commission shut down last year by Gov. Andrew M. Cuomo have told federal prosecutors that they believed he and his staff intervened in its operations “in a manner that, at times, led them to question the independence” of the panel, the prosecutors said in a recent letter.

The letter, which briefly summarizes the officials’ statements, was attached to court papers filed on Friday night by lawyers for Sheldon Silver, the former Assembly speaker, as he prepares for his corruption case in federal court in Manhattan.

The officials have not spoken publicly about the involvement of the governor’s office in the operation of the panel, which was known as the Moreland Commission. Their statements to prosecutors are in contrast to Mr. Cuomo’s assertions last summer that his office did not inappropriately intervene in the work of the panel, which he created in July 2013 and abruptly disbanded nine months later.

It is unclear from the filings how or if the defense or government might seek to use the former Moreland officials’ statements about Mr. Cuomo in Mr. Silver’s trial, or if they would be allowed to by the judge. The trial is scheduled to begin on Nov. 2.