In August 2021, when IRS investigators were preparing to meet with Kevin Morris, the CIA intervened to stop the interview. The CIA summoned two DOJ officials to CIA headquarters in Langley, Virginia for a briefing regarding Mr. Morris. At that meeting, it was communicated that Mr. Morris could not be a witness in the investigation.

https://judiciary.house.gov/media/press-releases/whistleblower-reveals-cia-stonewalled-interview-hunter-biden-business-0

https://nypost.com/2024/03/21/us-news/cia-blocked-feds-from-interviewing-hunter-bidens-sugar-bro-kevin-morris-during-tax-probe/