NASHVILLE, Tenn. (WKRN) — A court filing from a Metro Nashville Police Department lieutenant suggests a department whistleblower is tied to the leak of The Covenant School killer’s writings.

A declaration was filed by Lt. Alfredo Arevalo claims he handed a hard drive containing the Covenant investigative case file to the whistleblower to place in a safe located in his office.

Former Lt. Garet Davidson was the only person at the time who had the key and combination to the locked safe, according to the filing.

Arevalo confirmed in the filing the documents that have leaked are from the killer’s writings.

In the 61-page report, Davidson attacked MNPD for a range of hot-button issues, including allegations of efforts to disempower the Community Oversight Board.

“You’re talking about an organization getting involved in the crafting of the legislation in some way that pertains to it. It is a direct conflict of interest. It undermines public transparency and accountability,” Davidson told News 2.

Davidson County Chancellor I’ashea Myles set a “show-cause” hearing for Monday after receiving a media call for comment about a story posted by the Tennessee Star. The news organization published multiple stories after reportedly obtaining 80 pages of the shooter’s writings from a source close to the investigation.

The Tennessee Star filing an appeal to cancel the upcoming hearing after the documents were published.

The show cause hearing is scheduled to take place at 11 a.m. on Monday, June 17.