Lev Parnas﻿, a Donald Trump contributor indicted on campaign finance charges, is seeking to release even more records that are “essential” to the president’s impeachment inquiry, Parnas’ attorney argued in a letter Saturday to a judge.

Parnas, a close business associate of Trump personal attorney Rudy Giuliani, won permission from U.S. District Court Judge Paul Oetken last week to give lawmakers access to his phone records and other documents seized by federal investigators when he was arrested in October. The House Intelligence Committee subpoenaed the records as part of its impeachment investigation, according to Parnas’ attorney, Joseph Bondy.

Now, he wants to release additional records from two cellphones and an iPad to the House Intelligence Committee, according to a court filing.

“Review of these materials is essential to the Committee’s ability to corroborate the strength of Mr. Parnas’ potential testimony,” his attorney wrote in the letter.